diff --git a/activesupport/CHANGELOG.md b/activesupport/CHANGELOG.md
index cfec71e34bc02..032abbf188f19 100644
--- a/activesupport/CHANGELOG.md
+++ b/activesupport/CHANGELOG.md
@@ -1,3 +1,7 @@
+*   Remove deprecated `Module#parent_name`, `Module#parent` and `Module#parents`.
+
+    *Rafael Mendonça França*
+
 *   Remove deprecated `ActiveSupport::LoggerThreadSafeLevel#after_initialize`.
 
     *Rafael Mendonça França*
diff --git a/activesupport/lib/active_support/core_ext/module/introspection.rb b/activesupport/lib/active_support/core_ext/module/introspection.rb
index e45e3d3007ff4..7cdcab59b8a76 100644
--- a/activesupport/lib/active_support/core_ext/module/introspection.rb
+++ b/activesupport/lib/active_support/core_ext/module/introspection.rb
@@ -17,14 +17,6 @@ def module_parent_name
     end
   end
 
-  def parent_name
-    ActiveSupport::Deprecation.warn(<<-MSG.squish)
-      `Module#parent_name` has been renamed to `module_parent_name`.
-      `parent_name` is deprecated and will be removed in Rails 6.1.
-    MSG
-    module_parent_name
-  end
-
   # Returns the module which contains this one according to its name.
   #
   #   module M
@@ -44,14 +36,6 @@ def module_parent
     module_parent_name ? ActiveSupport::Inflector.constantize(module_parent_name) : Object
   end
 
-  def parent
-    ActiveSupport::Deprecation.warn(<<-MSG.squish)
-      `Module#parent` has been renamed to `module_parent`.
-      `parent` is deprecated and will be removed in Rails 6.1.
-    MSG
-    module_parent
-  end
-
   # Returns all the parents of this module according to its name, ordered from
   # nested outwards. The receiver is not contained within the result.
   #
@@ -76,12 +60,4 @@ def module_parents
     parents << Object unless parents.include? Object
     parents
   end
-
-  def parents
-    ActiveSupport::Deprecation.warn(<<-MSG.squish)
-      `Module#parents` has been renamed to `module_parents`.
-      `parents` is deprecated and will be removed in Rails 6.1.
-    MSG
-    module_parents
-  end
 end
diff --git a/activesupport/test/core_ext/module/introspection_test.rb b/activesupport/test/core_ext/module/introspection_test.rb
index f9f649ce8179c..8d1a742eb2936 100644
--- a/activesupport/test/core_ext/module/introspection_test.rb
+++ b/activesupport/test/core_ext/module/introspection_test.rb
@@ -26,32 +26,14 @@ def test_module_parent_name_when_frozen
     assert_equal "ParentA::B", ParentA::B::FrozenC.module_parent_name
   end
 
-  def test_parent_name
-    assert_deprecated do
-      assert_equal "ParentA", ParentA::B.parent_name
-    end
-  end
-
   def test_module_parent
     assert_equal ParentA::B, ParentA::B::C.module_parent
     assert_equal ParentA, ParentA::B.module_parent
     assert_equal Object, ParentA.module_parent
   end
 
-  def test_parent
-    assert_deprecated do
-      assert_equal ParentA, ParentA::B.parent
-    end
-  end
-
   def test_module_parents
     assert_equal [ParentA::B, ParentA, Object], ParentA::B::C.module_parents
     assert_equal [ParentA, Object], ParentA::B.module_parents
   end
-
-  def test_parents
-    assert_deprecated do
-      assert_equal [ParentA, Object], ParentA::B.parents
-    end
-  end
 end
diff --git a/guides/source/6_1_release_notes.md b/guides/source/6_1_release_notes.md
index 94dee39b1a6f2..c60310cecefdb 100644
--- a/guides/source/6_1_release_notes.md
+++ b/guides/source/6_1_release_notes.md
@@ -290,6 +290,8 @@ Please refer to the [Changelog][active-support] for detailed changes.
 
 *   Remove deprecated `ActiveSupport::LoggerThreadSafeLevel#after_initialize`.
 
+*   Remove deprecated `Module#parent_name`, `Module#parent` and `Module#parents`.
+
 ### Deprecations
 
 ### Notable changes