diff --git a/.upgradenotes/MDL-83164-2024092002215993.yml b/.upgradenotes/MDL-83164-2024092002215993.yml
new file mode 100644
index 00000000000..7594cfdb6b0
--- /dev/null
+++ b/.upgradenotes/MDL-83164-2024092002215993.yml
@@ -0,0 +1,57 @@
+issueNumber: MDL-83164
+notes:
+  core:
+    - message: >
+        When rendering a renderable located within a namespace, the namespace
+        will now be included in the renderer method name with double-underscores
+        separating the namespace parts.
+
+
+        Note: Only those renderables within an `output` namespace will be
+        considered, for example `\core\output\action_menu\link` and only the
+        parts of the namespace after `output` will be included.
+
+
+        The following are examples of the new behaviour:
+
+        | Renderable name                         | Renderer method
+        name               |
+
+        | ---                                     |
+        ---                                |
+
+        | `\core\output\action_menu\link`         |
+        `render_action_menu__link`         |
+
+        | `\core\output\action_menu\link_primary` |
+        `render_action_menu__link_primary` |
+
+        | `\core\output\action\menu\link`         |
+        `render_action__menu__link`        |
+
+        | `\core\output\user_menu\link`           |
+        `render_user_menu__link`           |
+      type: improved
+    - message: >
+        The following renderer methods have been deprecated from the core
+        renderer:
+
+
+        | method                              |
+        replacement                          |
+
+        | ---                                 |
+        ---                                  |
+
+        | `render_action_menu_link`           |
+        `render_action_menu__link`           |
+
+        | `render_action_menu_link_primary`   |
+        `render_action_menu__link_primary`   |
+
+        | `render_action_menu_link_secondary` |
+        `render_action_menu__link_secondary` |
+
+        | `render_action_menu_filler`         |
+        `render_action_menu__filler`         |
+      type: deprecated
diff --git a/lib/classes/output/core_renderer.php b/lib/classes/output/core_renderer.php
index 7b201004858..16e50445090 100644
--- a/lib/classes/output/core_renderer.php
+++ b/lib/classes/output/core_renderer.php
@@ -40,13 +40,9 @@ use core\hook\output\before_html_attributes;
 use core\hook\output\before_http_headers;
 use core\hook\output\before_standard_footer_html_generation;
 use core\hook\output\before_standard_top_of_body_html_generation;
-use core\output\action_menu\link as action_menu_link;
-use core\output\action_menu\link_primary as action_menu_link_primary;
 use core\output\actions\component_action;
 use core\output\actions\popup_action;
-use core\output\action_menu\filler as action_menu_filler;
 use core\plugin_manager;
-use core\output\action_menu\link_secondary as action_menu_link_secondary;
 use moodleform;
 use moodle_page;
 use moodle_url;
@@ -1304,7 +1300,7 @@ class core_renderer extends renderer_base {
 
         // We don't want the class icon there!
         foreach ($menu->get_secondary_actions() as $action) {
-            if ($action instanceof \action_menu_link && $action->has_class('icon')) {
+            if ($action instanceof action_menu\link && $action->has_class('icon')) {
                 $action->attributes['class'] = preg_replace('/(^|\s+)icon(\s+|$)/i', '', $action->attributes['class']);
             }
         }
@@ -1391,43 +1387,95 @@ class core_renderer extends renderer_base {
     }
 
     /**
-     * Renders an action_menu_link item.
+     * @deprecated Since Moodle 4.5. Will be removed in MDL-83221
+     */
+    #[\core\attribute\deprecated(
+        replacement: 'render_action_menu__link',
+        since: '4.5',
+        mdl: 'MDL-83164',
+    )]
+    protected function render_action_menu_link(\action_menu_link $action) {
+        \core\deprecation::emit_deprecation_if_present([$this, __FUNCTION__]);
+        return $this->render_action_menu__link($action);
+    }
+
+    /**
+     * @deprecated Since Moodle 4.5. Will be removed in MDL-83221
+     */
+    #[\core\attribute\deprecated(
+        replacement: 'render_action_menu__filler',
+        since: '4.5',
+        mdl: 'MDL-83164',
+    )]
+    protected function render_action_menu_filler(\action_menu_filler $action) {
+        \core\deprecation::emit_deprecation_if_present([$this, __FUNCTION__]);
+        return $this->render_action_menu__filler($action);
+    }
+
+    /**
+     * @deprecated Since Moodle 4.5. Will be removed in MDL-83221
+     */
+    #[\core\attribute\deprecated(
+        replacement: 'render_action_menu__link_primary',
+        since: '4.5',
+        mdl: 'MDL-83164',
+    )]
+    protected function render_action_menu_primary(\action_menu_link $action) {
+        \core\deprecation::emit_deprecation_if_present([$this, __FUNCTION__]);
+        return $this->render_action_menu__link_primary($action);
+    }
+
+    /**
+     * @deprecated Since Moodle 4.5. Will be removed in MDL-83221
+     */
+    #[\core\attribute\deprecated(
+        replacement: 'render_action_menu__link_secondary',
+        since: '4.5',
+        mdl: 'MDL-83164',
+    )]
+    protected function render_action_menu_secondary(\action_menu_link $action) {
+        \core\deprecation::emit_deprecation_if_present([$this, __FUNCTION__]);
+        return $this->render_action_menu__link_secondary($action);
+    }
+
+    /**
+     * Renders an action_menu link item.
      *
-     * @param action_menu_link $action
+     * @param action_menu\link $action
      * @return string HTML fragment
      */
-    protected function render_action_menu_link(action_menu_link $action) {
+    protected function render_action_menu__link(action_menu\link $action) {
         return $this->render_from_template('core/action_menu_link', $action->export_for_template($this));
     }
 
     /**
-     * Renders a primary action_menu_filler item.
+     * Renders a primary action_menu filler item.
      *
-     * @param action_menu_filler $action
+     * @param action_menu\filler $action
      * @return string HTML fragment
      */
-    protected function render_action_menu_filler(action_menu_filler $action) {
+    protected function render_action_menu__filler(action_menu\filler $action) {
         return html_writer::span(' ', 'filler');
     }
 
     /**
-     * Renders a primary action_menu_link item.
+     * Renders a primary action_menu link item.
      *
-     * @param action_menu_link_primary $action
+     * @param action_menu\link_primary $action
      * @return string HTML fragment
      */
-    protected function render_action_menu_link_primary(action_menu_link_primary $action) {
-        return $this->render_action_menu_link($action);
+    protected function render_action_menu__link_primary(action_menu\link_primary $action) {
+        return $this->render_action_menu__link($action);
     }
 
     /**
-     * Renders a secondary action_menu_link item.
+     * Renders a secondary action_menu link item.
      *
-     * @param action_menu_link_secondary $action
+     * @param action_menu\link_secondary $action
      * @return string HTML fragment
      */
-    protected function render_action_menu_link_secondary(action_menu_link_secondary $action) {
-        return $this->render_action_menu_link($action);
+    protected function render_action_menu__link_secondary(action_menu\link_secondary $action) {
+        return $this->render_action_menu__link($action);
     }
 
     /**
@@ -3178,7 +3226,7 @@ EOD;
         );
 
         // Create a divider (well, a filler).
-        $divider = new action_menu_filler();
+        $divider = new action_menu\filler();
         $divider->primary = false;
 
         $am = new action_menu();
@@ -3215,7 +3263,7 @@ EOD;
                             ) . $value->title;
                         }
 
-                        $al = new action_menu_link_secondary(
+                        $al = new action_menu\link_secondary(
                             $value->url,
                             $pix,
                             $value->title,
diff --git a/lib/classes/output/renderer_base.php b/lib/classes/output/renderer_base.php
index 00910c3eaab..dc276135aaa 100644
--- a/lib/classes/output/renderer_base.php
+++ b/lib/classes/output/renderer_base.php
@@ -218,15 +218,29 @@ class renderer_base {
     public function render(renderable $widget) {
         $classparts = explode('\\', get_class($widget));
         // Strip namespaces.
-        $classname = array_pop($classparts);
+        $classpartname = array_pop($classparts);
         // Remove _renderable suffixes.
-        $classname = preg_replace('/_renderable$/', '', $classname);
+        $classname = preg_replace('/_renderable$/', '', $classpartname);
 
-        $rendermethod = "render_{$classname}";
-        if (method_exists($this, $rendermethod)) {
-            // Call the render_[widget_name] function.
-            // Note: This has a higher priority than the named_templatable to allow the theme to override the template.
-            return $this->$rendermethod($widget);
+        $rendermethods = [];
+
+        // If the renderable is located within a namespace, and that namespace is within the `output` L2 API,
+        // include the namespace as a possible renderer method name.
+        if (array_search('output', $classparts) === 1 && count($classparts) > 2) {
+            $concatenators = array_slice($classparts, 2);
+            $concatenators[] = $classname;
+            $rendermethods[] = "render_" . implode('__', $concatenators);
+        }
+
+        // Fall back to the last part of the class name.
+        $rendermethods[] = "render_{$classname}";
+
+        foreach ($rendermethods as $rendermethod) {
+            if (method_exists($this, $rendermethod)) {
+                // Call the render_[widget_name] function.
+                // Note: This has a higher priority than the named_templatable to allow the theme to override the template.
+                return $this->$rendermethod($widget);
+            }
         }
 
         if ($widget instanceof named_templatable) {
@@ -250,6 +264,8 @@ class renderer_base {
             $context = $widget->export_for_template($this);
             return $this->render_from_template($template, $context);
         }
+
+        $rendermethod = reset($rendermethods);
         throw new coding_exception("Can not render widget, renderer method ('{$rendermethod}') not found.");
     }