diff --git a/ChangeLog.adoc b/ChangeLog.adoc
index 3b1ee9dca..93c9a8052 100644
--- a/ChangeLog.adoc
+++ b/ChangeLog.adoc
@@ -30,6 +30,7 @@ New features::
   * core: add option `-s` in command `/command` to execute multiple commands separated by semicolons
   * core: allow case insensitive search of partial buffer name with `(?i)name` in command `/buffer`
   * core: use function util_strftimeval in evaluation of expression `date:xxx`
+  * api: allow search by group and nick id in functions nicklist_search_group and nicklist_search_nick (issue #2081)
   * api: allow search by buffer id in function buffer_search (issue #2081)
   * api: add modifier "color_decode" to decode WeeChat colors with a replacement string
   * api: use whole replacement string instead of first char in function string_remove_color
diff --git a/doc/en/weechat_plugin_api.en.adoc b/doc/en/weechat_plugin_api.en.adoc
index 191146aa8..27027a9e9 100644
--- a/doc/en/weechat_plugin_api.en.adoc
+++ b/doc/en/weechat_plugin_api.en.adoc
@@ -15501,7 +15501,9 @@ group = weechat.nicklist_add_group(my_buffer, my_parent_group, "test_group",
 
 ==== nicklist_search_group
 
-Search a group in a nicklist.
+_Updated in 4.3.0._
+
+Search a group in a nicklist by name or unique identifier (`id`).
 
 Prototype:
 
@@ -15517,7 +15519,8 @@ Arguments:
 * _buffer_: buffer pointer
 * _from_group_: search from this group only, if NULL, then search in whole
   nicklist
-* _name_: group name to search
+* _name_: group name to search; with WeeChat ≥ 4.3.0, a unique identifier can
+  be given with the format: `==id:xxx` (where `xxx` is the identifier)
 
 Return value:
 
@@ -15527,8 +15530,10 @@ C example:
 
 [source,c]
 ----
-struct t_gui_nick_group *ptr_group = weechat_nicklist_search_group (my_buffer,
-                                                                    NULL, "test_group");
+struct t_gui_nick_group *ptr_group1 = weechat_nicklist_search_group (my_buffer,
+                                                                     NULL, "test_group");
+struct t_gui_nick_group *ptr_group2 = weechat_nicklist_search_group (my_buffer,
+                                                                     NULL, "==id:1714382231198764");
 ----
 
 Script (Python):
@@ -15538,8 +15543,9 @@ Script (Python):
 # prototype
 def nicklist_search_group(buffer: str, from_group: str, name: str) -> str: ...
 
-# example
-group = weechat.nicklist_search_group(my_buffer, "", "test_group")
+# examples
+group1 = weechat.nicklist_search_group(my_buffer, "", "test_group")
+group2 = weechat.nicklist_search_group(my_buffer, "", "==id:1714382231198764")
 ----
 
 ==== nicklist_add_nick
@@ -15616,7 +15622,9 @@ nick = weechat.nicklist_add_nick(my_buffer, my_group, "test_nick", color, "@", "
 
 ==== nicklist_search_nick
 
-Search a nick in a nicklist.
+_Updated in 4.3.0._
+
+Search a nick in a nicklist by name or unique identifier (`id`).
 
 Prototype:
 
@@ -15632,7 +15640,8 @@ Arguments:
 * _buffer_: buffer pointer
 * _from_group_: search from this group only, if NULL, then search in whole
   nicklist
-* _name_: nick name to search
+* _name_: nick name to search; with WeeChat ≥ 4.3.0, a unique identifier can
+  be given with the format: `==id:xxx` (where `xxx` is the identifier)
 
 Return value:
 
@@ -15642,8 +15651,10 @@ C example:
 
 [source,c]
 ----
-struct t_gui_nick *ptr_nick = weechat_nicklist_search_nick (my_buffer,
-                                                            NULL, "test_nick");
+struct t_gui_nick *ptr_nick1 = weechat_nicklist_search_nick (my_buffer,
+                                                             NULL, "test_nick");
+struct t_gui_nick *ptr_nick2 = weechat_nicklist_search_nick (my_buffer,
+                                                             NULL, "==id:1714382252187496");
 ----
 
 Script (Python):
@@ -15653,8 +15664,9 @@ Script (Python):
 # prototype
 def nicklist_search_nick(buffer: str, from_group: str, name: str) -> str: ...
 
-# example
-nick = weechat.nicklist_search_nick(my_buffer, "", "test_nick")
+# examples
+nick1 = weechat.nicklist_search_nick(my_buffer, "", "test_nick")
+nick2 = weechat.nicklist_search_nick(my_buffer, "", "==id:1714382252187496")
 ----
 
 ==== nicklist_remove_group
diff --git a/doc/fr/weechat_plugin_api.fr.adoc b/doc/fr/weechat_plugin_api.fr.adoc
index 88cc1036d..66f342d91 100644
--- a/doc/fr/weechat_plugin_api.fr.adoc
+++ b/doc/fr/weechat_plugin_api.fr.adoc
@@ -15842,7 +15842,9 @@ group = weechat.nicklist_add_group(my_buffer, my_parent_group, "groupe_test",
 
 ==== nicklist_search_group
 
-Rechercher un groupe dans la liste des pseudos.
+_Mis à jour dans la 4.3.0._
+
+Rechercher un groupe dans la liste des pseudos par nom ou identifiant unique (`id`).
 
 Prototype :
 
@@ -15858,7 +15860,8 @@ Paramètres :
 * _buffer_ : pointeur vers le tampon
 * _from_group_ : recherche depuis ce groupe seulement, si NULL, alors recherche
   dans toute la liste des pseudos
-* _name_ : nom du groupes à rechercher
+* _name_ : nom du groupe à rechercher ; avec WeeChat ≥ 4.3.0, un identifiant
+  unique peut être donné avec le format : `==id:xxx` (où `xxx` est l'identifiant)
 
 Valeur de retour :
 
@@ -15868,8 +15871,10 @@ Exemple en C :
 
 [source,c]
 ----
-struct t_gui_nick_group *ptr_group = weechat_nicklist_search_group (my_buffer,
-                                                                    NULL, "groupe_test");
+struct t_gui_nick_group *ptr_group1 = weechat_nicklist_search_group (my_buffer,
+                                                                     NULL, "groupe_test");
+struct t_gui_nick_group *ptr_group2 = weechat_nicklist_search_group (my_buffer,
+                                                                     NULL, "==id:1714382231198764");
 ----
 
 Script (Python) :
@@ -15879,8 +15884,9 @@ Script (Python) :
 # prototype
 def nicklist_search_group(buffer: str, from_group: str, name: str) -> str: ...
 
-# exemple
-group = weechat.nicklist_search_group(my_buffer, "", "groupe_test")
+# exemples
+group1 = weechat.nicklist_search_group(my_buffer, "", "groupe_test")
+group2 = weechat.nicklist_search_group(my_buffer, "", "==id:1714382231198764")
 ----
 
 ==== nicklist_add_nick
@@ -15957,7 +15963,9 @@ nick = weechat.nicklist_add_nick(my_buffer, my_group, "test_nick", color, "@", "
 
 ==== nicklist_search_nick
 
-Rechercher un pseudo dans la liste des pseudos.
+_Mis à jour dans la 4.3.0._
+
+Rechercher un pseudo dans la liste des pseudos par nom ou identifiant unique (`id`).
 
 Prototype :
 
@@ -15973,7 +15981,8 @@ Paramètres :
 * _buffer_ : pointeur vers le tampon
 * _from_group_ : recherche depuis ce groupe seulement, si NULL, alors recherche
   dans toute la liste des pseudos
-* _name_ : nom du pseudo à rechercher
+* _name_ : nom du pseudo à rechercher ; avec WeeChat ≥ 4.3.0, un identifiant
+  unique peut être donné avec le format : `==id:xxx` (où `xxx` est l'identifiant)
 
 Valeur de retour :
 
@@ -15983,8 +15992,10 @@ Exemple en C :
 
 [source,c]
 ----
-struct t_gui_nick *ptr_nick = weechat_nicklist_search_nick (my_buffer,
-                                                            NULL, "test_nick");
+struct t_gui_nick *ptr_nick1 = weechat_nicklist_search_nick (my_buffer,
+                                                             NULL, "test_nick");
+struct t_gui_nick *ptr_nick2 = weechat_nicklist_search_nick (my_buffer,
+                                                             NULL, "==id:1714382252187496");
 ----
 
 Script (Python) :
@@ -15994,8 +16005,9 @@ Script (Python) :
 # prototype
 def nicklist_search_nick(buffer: str, from_group: str, name: str) -> str: ...
 
-# exemple
-nick = weechat.nicklist_search_nick(my_buffer, "", "test_nick")
+# exemples
+nick1 = weechat.nicklist_search_nick(my_buffer, "", "test_nick")
+nick2 = weechat.nicklist_search_nick(my_buffer, "", "==id:1714382252187496")
 ----
 
 ==== nicklist_remove_group
diff --git a/doc/it/weechat_plugin_api.it.adoc b/doc/it/weechat_plugin_api.it.adoc
index 448e68828..409863809 100644
--- a/doc/it/weechat_plugin_api.it.adoc
+++ b/doc/it/weechat_plugin_api.it.adoc
@@ -16250,7 +16250,11 @@ group = weechat.nicklist_add_group(my_buffer, my_parent_group, "test_group",
 
 ==== nicklist_search_group
 
-Cerca un gruppo in una lista nick.
+// TRANSLATION MISSING
+_Updated in 4.3.0._
+
+// TRANSLATION MISSING
+Search a group in a nicklist by name or unique identifier (`id`).
 
 Prototipo:
 
@@ -16266,7 +16270,9 @@ Argomenti:
 * _buffer_: puntatore al buffer
 * _from_group_: ricerca solo da questo gruppo, se NULL, allora la cerca in
   tutta la lista nick
-* _name_: nome gruppo da cercare
+// TRANSLATION MISSING
+* _name_: group name to search; with WeeChat ≥ 4.3.0, a unique identifier can
+  be given with the format: `==id:xxx` (where `xxx` is the identifier)
 
 Valore restituito:
 
@@ -16276,8 +16282,10 @@ Esempio in C:
 
 [source,c]
 ----
-struct t_gui_nick_group *ptr_group = weechat_nicklist_search_group (my_buffer,
-                                                                    NULL, "test_group");
+struct t_gui_nick_group *ptr_group1 = weechat_nicklist_search_group (my_buffer,
+                                                                     NULL, "test_group");
+struct t_gui_nick_group *ptr_group2 = weechat_nicklist_search_group (my_buffer,
+                                                                     NULL, "==id:1714382231198764");
 ----
 
 Script (Python):
@@ -16288,7 +16296,8 @@ Script (Python):
 def nicklist_search_group(buffer: str, from_group: str, name: str) -> str: ...
 
 # esempio
-group = weechat.nicklist_search_group(my_buffer, "", "test_group")
+group1 = weechat.nicklist_search_group(my_buffer, "", "test_group")
+group2 = weechat.nicklist_search_group(my_buffer, "", "==id:1714382231198764")
 ----
 
 ==== nicklist_add_nick
@@ -16365,7 +16374,11 @@ nick = weechat.nicklist_add_nick(my_buffer, my_group, "test_nick", color, "@", "
 
 ==== nicklist_search_nick
 
-Cerca un nick nella lista nick.
+// TRANSLATION MISSING
+_Updated in 4.3.0._
+
+// TRANSLATION MISSING
+Search a nick in a nicklist by name or unique identifier (`id`).
 
 Prototipo:
 
@@ -16381,7 +16394,9 @@ Argomenti:
 * _buffer_: puntatore al buffer
 * _from_group_: cerca solo da questo gruppo, se NULL, allora cerca
   nell'intera lista nick
-* _name_: nick da cercare
+// TRANSLATION MISSING
+* _name_: nick name to search; with WeeChat ≥ 4.3.0, a unique identifier can
+  be given with the format: `==id:xxx` (where `xxx` is the identifier)
 
 Valore restituito:
 
@@ -16391,8 +16406,10 @@ Esempio in C:
 
 [source,c]
 ----
-struct t_gui_nick *ptr_nick = weechat_nicklist_search_nick (my_buffer,
-                                                            NULL, "test_nick");
+struct t_gui_nick *ptr_nick1 = weechat_nicklist_search_nick (my_buffer,
+                                                             NULL, "test_nick");
+struct t_gui_nick *ptr_nick2 = weechat_nicklist_search_nick (my_buffer,
+                                                             NULL, "==id:1714382252187496");
 ----
 
 Script (Python):
@@ -16403,7 +16420,8 @@ Script (Python):
 def nicklist_search_nick(buffer: str, from_group: str, name: str) -> str: ...
 
 # esempio
-nick = weechat.nicklist_search_nick(my_buffer, "", "test_nick")
+nick1 = weechat.nicklist_search_nick(my_buffer, "", "test_nick")
+nick2 = weechat.nicklist_search_nick(my_buffer, "", "==id:1714382252187496")
 ----
 
 ==== nicklist_remove_group
diff --git a/doc/ja/weechat_plugin_api.ja.adoc b/doc/ja/weechat_plugin_api.ja.adoc
index 06e626652..1c858077e 100644
--- a/doc/ja/weechat_plugin_api.ja.adoc
+++ b/doc/ja/weechat_plugin_api.ja.adoc
@@ -15744,7 +15744,10 @@ group = weechat.nicklist_add_group(my_buffer, my_parent_group, "test_group",
 
 ==== nicklist_search_group
 
-ニックネームリストからグループを検索。
+_WeeChat バージョン 4.3.0 で更新。_
+
+// TRANSLATION MISSING
+Search a group in a nicklist by name or unique identifier (`id`).
 
 プロトタイプ:
 
@@ -15760,7 +15763,9 @@ struct t_gui_nick_group *weechat_nicklist_search_group (struct t_gui_buffer *buf
 * _buffer_: バッファへのポインタ
 * _from_group_:
   このグループのみを検索、全てのニックネームリストから検索する場合は NULL
-* _name_: 検索するグループ名
+// TRANSLATION MISSING
+* _name_: group name to search; with WeeChat ≥ 4.3.0, a unique identifier can
+  be given with the format: `==id:xxx` (where `xxx` is the identifier)
 
 戻り値:
 
@@ -15770,8 +15775,10 @@ C 言語での使用例:
 
 [source,c]
 ----
-struct t_gui_nick_group *ptr_group = weechat_nicklist_search_group (my_buffer,
-                                                                    NULL, "test_group");
+struct t_gui_nick_group *ptr_group1 = weechat_nicklist_search_group (my_buffer,
+                                                                     NULL, "test_group");
+struct t_gui_nick_group *ptr_group2 = weechat_nicklist_search_group (my_buffer,
+                                                                     NULL, "==id:1714382231198764");
 ----
 
 スクリプト (Python) での使用例:
@@ -15782,7 +15789,8 @@ struct t_gui_nick_group *ptr_group = weechat_nicklist_search_group (my_buffer,
 def nicklist_search_group(buffer: str, from_group: str, name: str) -> str: ...
 
 # 例
-group = weechat.nicklist_search_group(my_buffer, "", "test_group")
+group1 = weechat.nicklist_search_group(my_buffer, "", "test_group")
+group2 = weechat.nicklist_search_group(my_buffer, "", "==id:1714382231198764")
 ----
 
 ==== nicklist_add_nick
@@ -15859,7 +15867,10 @@ nick = weechat.nicklist_add_nick(my_buffer, my_group, "test_nick", color, "@", "
 
 ==== nicklist_search_nick
 
-ニックネームリストからニックネームを検索。
+_WeeChat バージョン 4.3.0 で更新。_
+
+// TRANSLATION MISSING
+Search a nick in a nicklist by name or unique identifier (`id`).
 
 プロトタイプ:
 
@@ -15875,7 +15886,9 @@ struct t_gui_nick *weechat_nicklist_search_nick (struct t_gui_buffer *buffer,
 * _buffer_: バッファへのポインタ
 * _from_group_:
   このグループのみを検索、全てのニックネームリストから検索する場合は NULL
-* _name_: 検索するニックネーム
+// TRANSLATION MISSING
+* _name_: nick name to search; with WeeChat ≥ 4.3.0, a unique identifier can
+  be given with the format: `==id:xxx` (where `xxx` is the identifier)
 
 戻り値:
 
@@ -15885,8 +15898,10 @@ C 言語での使用例:
 
 [source,c]
 ----
-struct t_gui_nick *ptr_nick = weechat_nicklist_search_nick (my_buffer,
-                                                            NULL, "test_nick");
+struct t_gui_nick *ptr_nick1 = weechat_nicklist_search_nick (my_buffer,
+                                                             NULL, "test_nick");
+struct t_gui_nick *ptr_nick2 = weechat_nicklist_search_nick (my_buffer,
+                                                             NULL, "==id:1714382252187496");
 ----
 
 スクリプト (Python) での使用例:
@@ -15897,7 +15912,8 @@ struct t_gui_nick *ptr_nick = weechat_nicklist_search_nick (my_buffer,
 def nicklist_search_nick(buffer: str, from_group: str, name: str) -> str: ...
 
 # 例
-nick = weechat.nicklist_search_nick(my_buffer, "", "test_nick")
+nick1 = weechat.nicklist_search_nick(my_buffer, "", "test_nick")
+nick2 = weechat.nicklist_search_nick(my_buffer, "", "==id:1714382252187496")
 ----
 
 ==== nicklist_remove_group
diff --git a/doc/sr/weechat_plugin_api.sr.adoc b/doc/sr/weechat_plugin_api.sr.adoc
index 8edefa060..3d1fb9bc9 100644
--- a/doc/sr/weechat_plugin_api.sr.adoc
+++ b/doc/sr/weechat_plugin_api.sr.adoc
@@ -15085,7 +15085,10 @@ group = weechat.nicklist_add_group(my_buffer, my_parent_group, "test_group",
 
 ==== nicklist_search_group
 
-Тражи групу у листи надимака.
+_Ажурирано у верзији 4.3.0._
+
+// TRANSLATION MISSING
+Search a group in a nicklist by name or unique identifier (`id`).
 
 Прототип:
 
@@ -15100,7 +15103,9 @@ struct t_gui_nick_group *weechat_nicklist_search_group (struct t_gui_buffer *buf
 
 * _buffer_: показивач на бафер
 * _from_group_: тражи само од ове групе, ако је NULL, онда се претражује цела листа надимака
-* _name_: име групе која се тражи
+// TRANSLATION MISSING
+* _name_: group name to search; with WeeChat ≥ 4.3.0, a unique identifier can
+  be given with the format: `==id:xxx` (where `xxx` is the identifier)
 
 Повратна вредност:
 
@@ -15110,8 +15115,10 @@ C пример:
 
 [source,c]
 ----
-struct t_gui_nick_group *ptr_group = weechat_nicklist_search_group (my_buffer,
-                                                                    NULL, "test_group");
+struct t_gui_nick_group *ptr_group1 = weechat_nicklist_search_group (my_buffer,
+                                                                     NULL, "test_group");
+struct t_gui_nick_group *ptr_group2 = weechat_nicklist_search_group (my_buffer,
+                                                                     NULL, "==id:1714382231198764");
 ----
 
 Скрипта (Python):
@@ -15122,7 +15129,8 @@ struct t_gui_nick_group *ptr_group = weechat_nicklist_search_group (my_buffer,
 def nicklist_search_group(buffer: str, from_group: str, name: str) -> str: ...
 
 # пример
-group = weechat.nicklist_search_group(my_buffer, "", "test_group")
+group1 = weechat.nicklist_search_group(my_buffer, "", "test_group")
+group2 = weechat.nicklist_search_group(my_buffer, "", "==id:1714382231198764")
 ----
 
 ==== nicklist_add_nick
@@ -15199,7 +15207,10 @@ nick = weechat.nicklist_add_nick(my_buffer, my_group, "test_nick", color, "@", "
 
 ==== nicklist_search_nick
 
-Тражи надимак у листи надимака.
+_Ажурирано у верзији 4.3.0._
+
+// TRANSLATION MISSING
+Search a nick in a nicklist by name or unique identifier (`id`).
 
 Прототип:
 
@@ -15214,7 +15225,9 @@ struct t_gui_nick *weechat_nicklist_search_nick (struct t_gui_buffer *buffer,
 
 * _buffer_: показивач на бафер
 * _from_group_: тражи само од ове групе, ако је NULL, онда се претражује цела листа надимака
-* _name_: име надимка који се тражи
+// TRANSLATION MISSING
+* _name_: nick name to search; with WeeChat ≥ 4.3.0, a unique identifier can
+  be given with the format: `==id:xxx` (where `xxx` is the identifier)
 
 Повратна вредност:
 
@@ -15224,8 +15237,10 @@ C пример:
 
 [source,c]
 ----
-struct t_gui_nick *ptr_nick = weechat_nicklist_search_nick (my_buffer,
-                                                            NULL, "test_nick");
+struct t_gui_nick *ptr_nick1 = weechat_nicklist_search_nick (my_buffer,
+                                                             NULL, "test_nick");
+struct t_gui_nick *ptr_nick2 = weechat_nicklist_search_nick (my_buffer,
+                                                             NULL, "==id:1714382252187496");
 ----
 
 Скрипта (Python):
@@ -15236,7 +15251,8 @@ struct t_gui_nick *ptr_nick = weechat_nicklist_search_nick (my_buffer,
 def nicklist_search_nick(buffer: str, from_group: str, name: str) -> str: ...
 
 # пример
-nick = weechat.nicklist_search_nick(my_buffer, "", "test_nick")
+nick1 = weechat.nicklist_search_nick(my_buffer, "", "test_nick")
+nick2 = weechat.nicklist_search_nick(my_buffer, "", "==id:1714382252187496")
 ----
 
 ==== nicklist_remove_group
diff --git a/src/gui/gui-nicklist.c b/src/gui/gui-nicklist.c
index 1c9d7fd2a..cbb5ad8e8 100644
--- a/src/gui/gui-nicklist.c
+++ b/src/gui/gui-nicklist.c
@@ -182,23 +182,59 @@ gui_nicklist_insert_group_sorted (struct t_gui_nick_group **groups,
 }
 
 /*
- * Searches for a group in nicklist (this function must not be called directly).
+ * Searches for a group in nicklist by id (this function must not be called
+ * directly).
  *
  * Returns pointer to group found, NULL if not found.
  */
 
 struct t_gui_nick_group *
-gui_nicklist_search_group_internal (struct t_gui_buffer *buffer,
-                                    struct t_gui_nick_group *from_group,
-                                    const char *name,
-                                    int skip_digits)
+gui_nicklist_search_group_id (struct t_gui_buffer *buffer,
+                              struct t_gui_nick_group *from_group,
+                              long long id)
+{
+    struct t_gui_nick_group *ptr_group, *ptr_group_found;
+
+    if (!from_group)
+        from_group = buffer->nicklist_root;
+
+    if (!from_group)
+        return NULL;
+
+    if (from_group->id == id)
+        return from_group;
+
+    if (from_group->children)
+    {
+        for (ptr_group = from_group->children; ptr_group;
+             ptr_group = ptr_group->next_group)
+        {
+            ptr_group_found = gui_nicklist_search_group_id (buffer, ptr_group, id);
+            if (ptr_group_found)
+                return ptr_group_found;
+        }
+    }
+
+    /* group not found */
+    return NULL;
+}
+
+/*
+ * Searches for a group in nicklist by name (this function must not be called
+ * directly).
+ *
+ * Returns pointer to group found, NULL if not found.
+ */
+
+struct t_gui_nick_group *
+gui_nicklist_search_group_name (struct t_gui_buffer *buffer,
+                                struct t_gui_nick_group *from_group,
+                                const char *name,
+                                int skip_digits)
 {
     struct t_gui_nick_group *ptr_group, *ptr_group_found;
     const char *ptr_name;
 
-    if (!buffer || !name)
-        return NULL;
-
     if (!from_group)
         from_group = buffer->nicklist_root;
 
@@ -215,7 +251,7 @@ gui_nicklist_search_group_internal (struct t_gui_buffer *buffer,
         for (ptr_group = from_group->children; ptr_group;
              ptr_group = ptr_group->next_group)
         {
-            ptr_group_found = gui_nicklist_search_group_internal (
+            ptr_group_found = gui_nicklist_search_group_name (
                 buffer,
                 ptr_group,
                 name,
@@ -241,14 +277,26 @@ gui_nicklist_search_group (struct t_gui_buffer *buffer,
                            const char *name)
 {
     const char *ptr_name;
+    char *error;
+    long long id;
 
-    if (!buffer || !name)
+    if ((!buffer && !from_group)
+        || !name
+        || (!from_group && !buffer->nicklist_root))
+    {
         return NULL;
+    }
+
+    if (strncmp (name, "==id:", 5) == 0)
+    {
+        id = strtoll (name + 5, &error, 10);
+        if (error && !error[0])
+            return gui_nicklist_search_group_id (buffer, from_group, id);
+    }
 
     ptr_name = gui_nicklist_get_group_start (name);
-
-    return gui_nicklist_search_group_internal (buffer, from_group, name,
-                                               (ptr_name == name) ? 1 : 0);
+    return gui_nicklist_search_group_name (buffer, from_group, name,
+                                           (ptr_name == name) ? 1 : 0);
 }
 
 /*
@@ -431,27 +479,54 @@ gui_nicklist_insert_nick_sorted (struct t_gui_nick_group *group,
 }
 
 /*
- * Searches for a nick in nicklist.
+ * Searches for a nick in nicklist by id (this function must not be called
+ * directly).
  *
  * Returns pointer to nick found, NULL if not found.
  */
 
 struct t_gui_nick *
-gui_nicklist_search_nick (struct t_gui_buffer *buffer,
-                          struct t_gui_nick_group *from_group,
-                          const char *name)
+gui_nicklist_search_nick_id (struct t_gui_buffer *buffer,
+                             struct t_gui_nick_group *from_group,
+                             long long id)
 {
     struct t_gui_nick *ptr_nick;
     struct t_gui_nick_group *ptr_group;
 
-    if (!buffer && !from_group)
-        return NULL;
+    for (ptr_nick = (from_group) ? from_group->nicks : buffer->nicklist_root->nicks;
+         ptr_nick; ptr_nick = ptr_nick->next_nick)
+    {
+        if (ptr_nick->id == id)
+            return ptr_nick;
+    }
 
-    if (!name)
-        return NULL;
+    /* search nick in child groups */
+    for (ptr_group = (from_group) ? from_group->children : buffer->nicklist_root->children;
+         ptr_group; ptr_group = ptr_group->next_group)
+    {
+        ptr_nick = gui_nicklist_search_nick_id (buffer, ptr_group, id);
+        if (ptr_nick)
+            return ptr_nick;
+    }
 
-    if (!from_group && !buffer->nicklist_root)
-        return NULL;
+    /* nick not found */
+    return NULL;
+}
+
+/*
+ * Searches for a nick in nicklist by name (this function must not be called
+ * directly).
+ *
+ * Returns pointer to nick found, NULL if not found.
+ */
+
+struct t_gui_nick *
+gui_nicklist_search_nick_name (struct t_gui_buffer *buffer,
+                               struct t_gui_nick_group *from_group,
+                               const char *name)
+{
+    struct t_gui_nick *ptr_nick;
+    struct t_gui_nick_group *ptr_group;
 
     for (ptr_nick = (from_group) ? from_group->nicks : buffer->nicklist_root->nicks;
          ptr_nick; ptr_nick = ptr_nick->next_nick)
@@ -476,7 +551,7 @@ gui_nicklist_search_nick (struct t_gui_buffer *buffer,
     for (ptr_group = (from_group) ? from_group->children : buffer->nicklist_root->children;
          ptr_group; ptr_group = ptr_group->next_group)
     {
-        ptr_nick = gui_nicklist_search_nick (buffer, ptr_group, name);
+        ptr_nick = gui_nicklist_search_nick_name (buffer, ptr_group, name);
         if (ptr_nick)
             return ptr_nick;
     }
@@ -485,6 +560,37 @@ gui_nicklist_search_nick (struct t_gui_buffer *buffer,
     return NULL;
 }
 
+/*
+ * Searches for a nick in nicklist.
+ *
+ * Returns pointer to nick found, NULL if not found.
+ */
+
+struct t_gui_nick *
+gui_nicklist_search_nick (struct t_gui_buffer *buffer,
+                          struct t_gui_nick_group *from_group,
+                          const char *name)
+{
+    long long id;
+    char *error;
+
+    if ((!buffer && !from_group)
+        || !name
+        || (!from_group && !buffer->nicklist_root))
+    {
+        return NULL;
+    }
+
+    if (strncmp (name, "==id:", 5) == 0)
+    {
+        id = strtoll (name + 5, &error, 10);
+        if (error && !error[0])
+            return gui_nicklist_search_nick_id (buffer, from_group, id);
+    }
+
+    return gui_nicklist_search_nick_name (buffer, from_group, name);
+}
+
 /*
  * Adds a nick to nicklist with identifier (internal use).
  *
diff --git a/src/plugins/python/weechat.pyi b/src/plugins/python/weechat.pyi
index 6f151b22b..c8bc02f33 100644
--- a/src/plugins/python/weechat.pyi
+++ b/src/plugins/python/weechat.pyi
@@ -2001,8 +2001,9 @@ def nicklist_search_group(buffer: str, from_group: str, name: str) -> str:
     """`nicklist_search_group in WeeChat plugin API reference <https://weechat.org/doc/weechat/api/#_nicklist_search_group>`_
     ::
 
-        # example
-        group = weechat.nicklist_search_group(my_buffer, "", "test_group")
+        # examples
+        group1 = weechat.nicklist_search_group(my_buffer, "", "test_group")
+        group2 = weechat.nicklist_search_group(my_buffer, "", "==id:1714382231198764")
     """
     ...
 
@@ -2025,8 +2026,9 @@ def nicklist_search_nick(buffer: str, from_group: str, name: str) -> str:
     """`nicklist_search_nick in WeeChat plugin API reference <https://weechat.org/doc/weechat/api/#_nicklist_search_nick>`_
     ::
 
-        # example
-        nick = weechat.nicklist_search_nick(my_buffer, "", "test_nick")
+        # examples
+        nick1 = weechat.nicklist_search_nick(my_buffer, "", "test_nick")
+        nick2 = weechat.nicklist_search_nick(my_buffer, "", "==id:1714382252187496")
     """
     ...
 
diff --git a/tests/unit/gui/test-gui-nicklist.cpp b/tests/unit/gui/test-gui-nicklist.cpp
index afc864e1d..8da7d0a01 100644
--- a/tests/unit/gui/test-gui-nicklist.cpp
+++ b/tests/unit/gui/test-gui-nicklist.cpp
@@ -87,7 +87,8 @@ TEST(GuiNicklist, GenerateId)
  *   gui_nicklist_insert_group_sorted
  *   gui_nicklist_add_group_with_id
  *   gui_nicklist_add_group
- *   gui_nicklist_search_group_internal
+ *   gui_nicklist_search_group_id
+ *   gui_nicklist_search_group_name
  *   gui_nicklist_search_group
  *   gui_nicklist_remove_group
  *   gui_nicklist_remove_all
@@ -97,6 +98,7 @@ TEST(GuiNicklist, AddGroup)
 {
     struct t_gui_buffer *buffer;
     struct t_gui_nick_group *group1, *group2, *subgroup1, *subgroup2, *subgroup3;
+    char str_search_id[128];
 
     buffer = gui_buffer_new (NULL, TEST_BUFFER_NAME,
                              NULL, NULL, NULL,
@@ -195,8 +197,14 @@ TEST(GuiNicklist, AddGroup)
 
     POINTERS_EQUAL(group1, gui_nicklist_search_group (buffer, NULL, "group1"));
     POINTERS_EQUAL(group1, gui_nicklist_search_group (buffer, buffer->nicklist_root, "group1"));
+    snprintf (str_search_id, sizeof (str_search_id), "==id:%lld", group1->id);
+    POINTERS_EQUAL(group1, gui_nicklist_search_group (buffer, NULL, str_search_id));
+    POINTERS_EQUAL(group1, gui_nicklist_search_group (buffer, buffer->nicklist_root, str_search_id));
     POINTERS_EQUAL(group2, gui_nicklist_search_group (buffer, NULL, "group2"));
     POINTERS_EQUAL(group2, gui_nicklist_search_group (buffer, buffer->nicklist_root, "group2"));
+    snprintf (str_search_id, sizeof (str_search_id), "==id:%lld", group2->id);
+    POINTERS_EQUAL(group2, gui_nicklist_search_group (buffer, NULL, str_search_id));
+    POINTERS_EQUAL(group2, gui_nicklist_search_group (buffer, buffer->nicklist_root, str_search_id));
     POINTERS_EQUAL(subgroup1, gui_nicklist_search_group (buffer, NULL, "subgroup1"));
     POINTERS_EQUAL(subgroup1, gui_nicklist_search_group (buffer, NULL, "1|subgroup1"));
     POINTERS_EQUAL(subgroup1, gui_nicklist_search_group (buffer, buffer->nicklist_root, "subgroup1"));
@@ -205,14 +213,29 @@ TEST(GuiNicklist, AddGroup)
     POINTERS_EQUAL(NULL, gui_nicklist_search_group (buffer, group1, "1|subgroup1"));
     POINTERS_EQUAL(subgroup1, gui_nicklist_search_group (buffer, group2, "subgroup1"));
     POINTERS_EQUAL(subgroup1, gui_nicklist_search_group (buffer, group2, "1|subgroup1"));
+    snprintf (str_search_id, sizeof (str_search_id), "==id:%lld", subgroup1->id);
+    POINTERS_EQUAL(subgroup1, gui_nicklist_search_group (buffer, NULL, str_search_id));
+    POINTERS_EQUAL(subgroup1, gui_nicklist_search_group (buffer, buffer->nicklist_root, str_search_id));
+    POINTERS_EQUAL(NULL, gui_nicklist_search_group (buffer, group1, str_search_id));
+    POINTERS_EQUAL(subgroup1, gui_nicklist_search_group (buffer, group2, str_search_id));
     POINTERS_EQUAL(subgroup2, gui_nicklist_search_group (buffer, NULL, "subgroup2"));
     POINTERS_EQUAL(subgroup2, gui_nicklist_search_group (buffer, buffer->nicklist_root, "subgroup2"));
     POINTERS_EQUAL(NULL, gui_nicklist_search_group (buffer, group1, "subgroup2"));
     POINTERS_EQUAL(subgroup2, gui_nicklist_search_group (buffer, group2, "subgroup2"));
+    snprintf (str_search_id, sizeof (str_search_id), "==id:%lld", subgroup2->id);
+    POINTERS_EQUAL(subgroup2, gui_nicklist_search_group (buffer, NULL, str_search_id));
+    POINTERS_EQUAL(subgroup2, gui_nicklist_search_group (buffer, buffer->nicklist_root, str_search_id));
+    POINTERS_EQUAL(NULL, gui_nicklist_search_group (buffer, group1, str_search_id));
+    POINTERS_EQUAL(subgroup2, gui_nicklist_search_group (buffer, group2, str_search_id));
     POINTERS_EQUAL(subgroup3, gui_nicklist_search_group (buffer, NULL, "subgroup3"));
     POINTERS_EQUAL(subgroup3, gui_nicklist_search_group (buffer, buffer->nicklist_root, "subgroup3"));
     POINTERS_EQUAL(NULL, gui_nicklist_search_group (buffer, group1, "subgroup3"));
     POINTERS_EQUAL(subgroup3, gui_nicklist_search_group (buffer, group2, "subgroup3"));
+    snprintf (str_search_id, sizeof (str_search_id), "==id:%lld", subgroup3->id);
+    POINTERS_EQUAL(subgroup3, gui_nicklist_search_group (buffer, NULL, str_search_id));
+    POINTERS_EQUAL(subgroup3, gui_nicklist_search_group (buffer, buffer->nicklist_root, str_search_id));
+    POINTERS_EQUAL(NULL, gui_nicklist_search_group (buffer, group1, str_search_id));
+    POINTERS_EQUAL(subgroup3, gui_nicklist_search_group (buffer, group2, str_search_id));
 
     /* test remove of NULL buffer/group */
     gui_nicklist_remove_group (NULL, NULL);
@@ -247,6 +270,8 @@ TEST(GuiNicklist, AddGroup)
  *   gui_nicklist_insert_nick_sorted
  *   gui_nicklist_add_nick_with_id
  *   gui_nicklist_add_nick
+ *   gui_nicklist_search_nick_id
+ *   gui_nicklist_search_nick_name
  *   gui_nicklist_search_nick
  *   gui_nicklist_remove_nick
  *   gui_nicklist_remove_all
@@ -257,6 +282,7 @@ TEST(GuiNicklist, AddNick)
     struct t_gui_buffer *buffer;
     struct t_gui_nick_group *group1, *group2;
     struct t_gui_nick *nick_root, *nick1, *nick2, *nick3;
+    char str_search_id[128];
 
     buffer = gui_buffer_new (NULL, TEST_BUFFER_NAME,
                              NULL, NULL, NULL,
@@ -348,14 +374,29 @@ TEST(GuiNicklist, AddNick)
     POINTERS_EQUAL(nick1, gui_nicklist_search_nick (buffer, buffer->nicklist_root, "nick1"));
     POINTERS_EQUAL(NULL, gui_nicklist_search_nick (buffer, group1, "nick1"));
     POINTERS_EQUAL(nick1, gui_nicklist_search_nick (buffer, group2, "nick1"));
+    snprintf (str_search_id, sizeof (str_search_id), "==id:%lld", nick1->id);
+    POINTERS_EQUAL(nick1, gui_nicklist_search_nick (buffer, NULL, str_search_id));
+    POINTERS_EQUAL(nick1, gui_nicklist_search_nick (buffer, buffer->nicklist_root, str_search_id));
+    POINTERS_EQUAL(NULL, gui_nicklist_search_nick (buffer, group1, str_search_id));
+    POINTERS_EQUAL(nick1, gui_nicklist_search_nick (buffer, group2, str_search_id));
     POINTERS_EQUAL(nick2, gui_nicklist_search_nick (buffer, NULL, "nick2"));
     POINTERS_EQUAL(nick2, gui_nicklist_search_nick (buffer, buffer->nicklist_root, "nick2"));
     POINTERS_EQUAL(NULL, gui_nicklist_search_nick (buffer, group1, "nick2"));
     POINTERS_EQUAL(nick2, gui_nicklist_search_nick (buffer, group2, "nick2"));
+    snprintf (str_search_id, sizeof (str_search_id), "==id:%lld", nick2->id);
+    POINTERS_EQUAL(nick2, gui_nicklist_search_nick (buffer, NULL, str_search_id));
+    POINTERS_EQUAL(nick2, gui_nicklist_search_nick (buffer, buffer->nicklist_root, str_search_id));
+    POINTERS_EQUAL(NULL, gui_nicklist_search_nick (buffer, group1, str_search_id));
+    POINTERS_EQUAL(nick2, gui_nicklist_search_nick (buffer, group2, str_search_id));
     POINTERS_EQUAL(nick3, gui_nicklist_search_nick (buffer, NULL, "nick3"));
     POINTERS_EQUAL(nick3, gui_nicklist_search_nick (buffer, buffer->nicklist_root, "nick3"));
     POINTERS_EQUAL(NULL, gui_nicklist_search_nick (buffer, group1, "nick3"));
     POINTERS_EQUAL(nick3, gui_nicklist_search_nick (buffer, group2, "nick3"));
+    snprintf (str_search_id, sizeof (str_search_id), "==id:%lld", nick3->id);
+    POINTERS_EQUAL(nick3, gui_nicklist_search_nick (buffer, NULL, str_search_id));
+    POINTERS_EQUAL(nick3, gui_nicklist_search_nick (buffer, buffer->nicklist_root, str_search_id));
+    POINTERS_EQUAL(NULL, gui_nicklist_search_nick (buffer, group1, str_search_id));
+    POINTERS_EQUAL(nick3, gui_nicklist_search_nick (buffer, group2, str_search_id));
 
     /* test remove of NULL buffer/group */
     gui_nicklist_remove_nick (NULL, NULL);