diff --git a/AK/ByteBuffer.h b/AK/ByteBuffer.h
index cf50c58deb..f62a4c04d6 100644
--- a/AK/ByteBuffer.h
+++ b/AK/ByteBuffer.h
@@ -3,7 +3,7 @@
 #include "StdLibExtras.h"
 #include "Types.h"
 #include <AK/RefPtr.h>
-#include <AK/Retainable.h>
+#include <AK/RefCounted.h>
 #include <AK/kmalloc.h>
 
 namespace AK {
diff --git a/AK/Retainable.h b/AK/RefCounted.h
similarity index 100%
rename from AK/Retainable.h
rename to AK/RefCounted.h
diff --git a/AK/StringImpl.h b/AK/StringImpl.h
index 54881ad3c4..dbeb9d5ecf 100644
--- a/AK/StringImpl.h
+++ b/AK/StringImpl.h
@@ -1,7 +1,7 @@
 #pragma once
 
 #include <AK/RefPtr.h>
-#include <AK/Retainable.h>
+#include <AK/RefCounted.h>
 #include <AK/Types.h>
 #include <AK/kmalloc.h>
 
diff --git a/AK/Weakable.h b/AK/Weakable.h
index 6076ebe9ce..9489d8fc42 100644
--- a/AK/Weakable.h
+++ b/AK/Weakable.h
@@ -2,7 +2,7 @@
 
 #include "Assertions.h"
 #include "RefPtr.h"
-#include "Retainable.h"
+#include "RefCounted.h"
 
 namespace AK {
 
diff --git a/Applications/IRCClient/IRCChannel.h b/Applications/IRCClient/IRCChannel.h
index 0c25a5d000..d87d3f0613 100644
--- a/Applications/IRCClient/IRCChannel.h
+++ b/Applications/IRCClient/IRCChannel.h
@@ -4,7 +4,7 @@
 #include <AK/AKString.h>
 #include <AK/CircularQueue.h>
 #include <AK/RefPtr.h>
-#include <AK/Retainable.h>
+#include <AK/RefCounted.h>
 #include <AK/Vector.h>
 
 class IRCClient;
diff --git a/Applications/IRCClient/IRCLogBuffer.h b/Applications/IRCClient/IRCLogBuffer.h
index a725e14abf..7eecec4c86 100644
--- a/Applications/IRCClient/IRCLogBuffer.h
+++ b/Applications/IRCClient/IRCLogBuffer.h
@@ -3,7 +3,7 @@
 #include <AK/AKString.h>
 #include <AK/CircularQueue.h>
 #include <AK/RefPtr.h>
-#include <AK/Retainable.h>
+#include <AK/RefCounted.h>
 #include <SharedGraphics/Color.h>
 
 class IRCLogBufferModel;
diff --git a/Applications/IRCClient/IRCQuery.h b/Applications/IRCClient/IRCQuery.h
index c2b6dbe529..22a9931661 100644
--- a/Applications/IRCClient/IRCQuery.h
+++ b/Applications/IRCClient/IRCQuery.h
@@ -4,7 +4,7 @@
 #include <AK/AKString.h>
 #include <AK/CircularQueue.h>
 #include <AK/RefPtr.h>
-#include <AK/Retainable.h>
+#include <AK/RefCounted.h>
 #include <AK/Vector.h>
 
 class IRCClient;
diff --git a/DevTools/VisualBuilder/VBWidget.h b/DevTools/VisualBuilder/VBWidget.h
index d2d17e285f..c2520bab88 100644
--- a/DevTools/VisualBuilder/VBWidget.h
+++ b/DevTools/VisualBuilder/VBWidget.h
@@ -3,7 +3,7 @@
 #include "VBWidgetType.h"
 #include <AK/Function.h>
 #include <AK/HashMap.h>
-#include <AK/Retainable.h>
+#include <AK/RefCounted.h>
 #include <AK/NonnullRefPtr.h>
 #include <AK/Weakable.h>
 #include <SharedGraphics/Rect.h>
diff --git a/Kernel/Devices/DiskDevice.h b/Kernel/Devices/DiskDevice.h
index a8b7246e84..78290cfd3f 100644
--- a/Kernel/Devices/DiskDevice.h
+++ b/Kernel/Devices/DiskDevice.h
@@ -1,6 +1,6 @@
 #pragma once
 
-#include <AK/Retainable.h>
+#include <AK/RefCounted.h>
 #include <AK/Types.h>
 
 // FIXME: Support 64-bit DiskOffset
diff --git a/Kernel/File.h b/Kernel/File.h
index 870b4fbb6c..9c160428cb 100644
--- a/Kernel/File.h
+++ b/Kernel/File.h
@@ -1,7 +1,7 @@
 #pragma once
 
 #include <AK/AKString.h>
-#include <AK/Retainable.h>
+#include <AK/RefCounted.h>
 #include <AK/NonnullRefPtr.h>
 #include <AK/Types.h>
 #include <Kernel/KResult.h>
diff --git a/Kernel/FileSystem/Custody.h b/Kernel/FileSystem/Custody.h
index 287d099a30..dd6ad7cf32 100644
--- a/Kernel/FileSystem/Custody.h
+++ b/Kernel/FileSystem/Custody.h
@@ -3,7 +3,7 @@
 #include <AK/AKString.h>
 #include <AK/Badge.h>
 #include <AK/RefPtr.h>
-#include <AK/Retainable.h>
+#include <AK/RefCounted.h>
 
 class Inode;
 class VFS;
diff --git a/Kernel/FileSystem/Ext2FileSystem.h b/Kernel/FileSystem/Ext2FileSystem.h
index 64349ee1a2..ac460a2daf 100644
--- a/Kernel/FileSystem/Ext2FileSystem.h
+++ b/Kernel/FileSystem/Ext2FileSystem.h
@@ -20,7 +20,7 @@ public:
     size_t size() const { return m_raw_inode.i_size; }
     bool is_symlink() const { return ::is_symlink(m_raw_inode.i_mode); }
 
-    // ^Inode (Retainable magic)
+    // ^Inode (RefCounted magic)
     virtual void one_ref_left() override;
 
 private:
diff --git a/Kernel/FileSystem/FileDescription.h b/Kernel/FileSystem/FileDescription.h
index b856eff045..3da0b99512 100644
--- a/Kernel/FileSystem/FileDescription.h
+++ b/Kernel/FileSystem/FileDescription.h
@@ -3,7 +3,7 @@
 #include <AK/Badge.h>
 #include <AK/ByteBuffer.h>
 #include <AK/CircularQueue.h>
-#include <AK/Retainable.h>
+#include <AK/RefCounted.h>
 #include <Kernel/FileSystem/FIFO.h>
 #include <Kernel/FileSystem/Inode.h>
 #include <Kernel/FileSystem/InodeMetadata.h>
diff --git a/Kernel/FileSystem/FileSystem.h b/Kernel/FileSystem/FileSystem.h
index 78d86b1e45..58f839faef 100644
--- a/Kernel/FileSystem/FileSystem.h
+++ b/Kernel/FileSystem/FileSystem.h
@@ -9,7 +9,7 @@
 #include <AK/HashMap.h>
 #include <AK/OwnPtr.h>
 #include <AK/RefPtr.h>
-#include <AK/Retainable.h>
+#include <AK/RefCounted.h>
 #include <AK/WeakPtr.h>
 #include <AK/kstdio.h>
 #include <Kernel/Devices/DiskDevice.h>
diff --git a/Kernel/FileSystem/Inode.h b/Kernel/FileSystem/Inode.h
index f3b769710f..28696fc311 100644
--- a/Kernel/FileSystem/Inode.h
+++ b/Kernel/FileSystem/Inode.h
@@ -2,7 +2,7 @@
 
 #include <AK/AKString.h>
 #include <AK/Function.h>
-#include <AK/Retainable.h>
+#include <AK/RefCounted.h>
 #include <AK/WeakPtr.h>
 #include <Kernel/FileSystem/FileSystem.h>
 #include <Kernel/FileSystem/InodeIdentifier.h>
diff --git a/Kernel/Net/Socket.h b/Kernel/Net/Socket.h
index e506cd0c18..7ff1fe7506 100644
--- a/Kernel/Net/Socket.h
+++ b/Kernel/Net/Socket.h
@@ -2,7 +2,7 @@
 
 #include <AK/HashTable.h>
 #include <AK/RefPtr.h>
-#include <AK/Retainable.h>
+#include <AK/RefCounted.h>
 #include <AK/Vector.h>
 #include <Kernel/File.h>
 #include <Kernel/KResult.h>
diff --git a/Kernel/SharedMemory.h b/Kernel/SharedMemory.h
index 39e8864ea9..7cc36e1f00 100644
--- a/Kernel/SharedMemory.h
+++ b/Kernel/SharedMemory.h
@@ -2,7 +2,7 @@
 
 #include <AK/AKString.h>
 #include <AK/RefPtr.h>
-#include <AK/Retainable.h>
+#include <AK/RefCounted.h>
 #include <Kernel/File.h>
 #include <Kernel/KResult.h>
 #include <Kernel/UnixTypes.h>
diff --git a/Kernel/VM/MemoryManager.h b/Kernel/VM/MemoryManager.h
index 0da536448c..4475866259 100644
--- a/Kernel/VM/MemoryManager.h
+++ b/Kernel/VM/MemoryManager.h
@@ -6,7 +6,7 @@
 #include <AK/ByteBuffer.h>
 #include <AK/HashTable.h>
 #include <AK/RefPtr.h>
-#include <AK/Retainable.h>
+#include <AK/RefCounted.h>
 #include <AK/Types.h>
 #include <AK/Vector.h>
 #include <AK/Weakable.h>
diff --git a/Kernel/VM/PageDirectory.h b/Kernel/VM/PageDirectory.h
index 4d2c14438e..06698f75c5 100644
--- a/Kernel/VM/PageDirectory.h
+++ b/Kernel/VM/PageDirectory.h
@@ -2,7 +2,7 @@
 
 #include <AK/HashMap.h>
 #include <AK/RefPtr.h>
-#include <AK/Retainable.h>
+#include <AK/RefCounted.h>
 #include <Kernel/VM/PhysicalPage.h>
 #include <Kernel/VM/RangeAllocator.h>
 
diff --git a/Kernel/VM/PhysicalRegion.h b/Kernel/VM/PhysicalRegion.h
index 762f6a9edb..d3ec98d90a 100644
--- a/Kernel/VM/PhysicalRegion.h
+++ b/Kernel/VM/PhysicalRegion.h
@@ -1,7 +1,7 @@
 #pragma once
 
 #include <AK/Bitmap.h>
-#include <AK/Retainable.h>
+#include <AK/RefCounted.h>
 #include <AK/NonnullRefPtr.h>
 #include <Kernel/PhysicalAddress.h>
 #include <Kernel/VM/PhysicalPage.h>
diff --git a/Kernel/VM/VMObject.h b/Kernel/VM/VMObject.h
index d91a37614a..aff8e2af7c 100644
--- a/Kernel/VM/VMObject.h
+++ b/Kernel/VM/VMObject.h
@@ -3,7 +3,7 @@
 #include <AK/AKString.h>
 #include <AK/Badge.h>
 #include <AK/RefPtr.h>
-#include <AK/Retainable.h>
+#include <AK/RefCounted.h>
 #include <AK/Vector.h>
 #include <AK/Weakable.h>
 #include <Kernel/Lock.h>
diff --git a/LibC/SharedBuffer.h b/LibC/SharedBuffer.h
index 6ad334e955..aec7ab3047 100644
--- a/LibC/SharedBuffer.h
+++ b/LibC/SharedBuffer.h
@@ -1,7 +1,7 @@
 #pragma once
 
 #include <AK/RefPtr.h>
-#include <AK/Retainable.h>
+#include <AK/RefCounted.h>
 
 class SharedBuffer : public RefCounted<SharedBuffer> {
 public:
diff --git a/LibCore/CConfigFile.h b/LibCore/CConfigFile.h
index 8b36835bf9..1816ba53c9 100644
--- a/LibCore/CConfigFile.h
+++ b/LibCore/CConfigFile.h
@@ -3,7 +3,7 @@
 #include <AK/AKString.h>
 #include <AK/HashMap.h>
 #include <AK/RefPtr.h>
-#include <AK/Retainable.h>
+#include <AK/RefCounted.h>
 #include <AK/Vector.h>
 #include <SharedGraphics/Color.h>
 
diff --git a/LibCore/CNetworkResponse.h b/LibCore/CNetworkResponse.h
index df256201af..c637f6a514 100644
--- a/LibCore/CNetworkResponse.h
+++ b/LibCore/CNetworkResponse.h
@@ -1,7 +1,7 @@
 #pragma once
 
 #include <AK/ByteBuffer.h>
-#include <AK/Retainable.h>
+#include <AK/RefCounted.h>
 
 class CNetworkResponse : public RefCounted<CNetworkResponse> {
 public:
diff --git a/LibGUI/GAction.h b/LibGUI/GAction.h
index 8c4d415e10..1a80737721 100644
--- a/LibGUI/GAction.h
+++ b/LibGUI/GAction.h
@@ -4,7 +4,7 @@
 #include <AK/Badge.h>
 #include <AK/Function.h>
 #include <AK/HashTable.h>
-#include <AK/Retainable.h>
+#include <AK/RefCounted.h>
 #include <AK/NonnullRefPtr.h>
 #include <AK/WeakPtr.h>
 #include <AK/Weakable.h>
diff --git a/LibGUI/GMenu.h b/LibGUI/GMenu.h
index fc6a78ba18..4848f7a9fc 100644
--- a/LibGUI/GMenu.h
+++ b/LibGUI/GMenu.h
@@ -1,7 +1,7 @@
 #pragma once
 
 #include <AK/Function.h>
-#include <AK/Retainable.h>
+#include <AK/RefCounted.h>
 #include <AK/NonnullRefPtr.h>
 #include <AK/Vector.h>
 #include <LibGUI/GMenuItem.h>
diff --git a/LibGUI/GModel.h b/LibGUI/GModel.h
index 6e96e0a431..dbb94524da 100644
--- a/LibGUI/GModel.h
+++ b/LibGUI/GModel.h
@@ -4,7 +4,7 @@
 #include <AK/Badge.h>
 #include <AK/Function.h>
 #include <AK/HashTable.h>
-#include <AK/Retainable.h>
+#include <AK/RefCounted.h>
 #include <LibGUI/GModelIndex.h>
 #include <LibGUI/GVariant.h>
 #include <SharedGraphics/TextAlignment.h>
diff --git a/LibHTML/CSS/StyleValue.h b/LibHTML/CSS/StyleValue.h
index 3867fe4ffe..55d34c3082 100644
--- a/LibHTML/CSS/StyleValue.h
+++ b/LibHTML/CSS/StyleValue.h
@@ -1,6 +1,6 @@
 #pragma once
 
-#include <AK/Retainable.h>
+#include <AK/RefCounted.h>
 
 class StyleValue : public RefCounted<StyleValue> {
 public:
diff --git a/SharedGraphics/CharacterBitmap.h b/SharedGraphics/CharacterBitmap.h
index ee4118a64f..536725c510 100644
--- a/SharedGraphics/CharacterBitmap.h
+++ b/SharedGraphics/CharacterBitmap.h
@@ -2,7 +2,7 @@
 
 #include "Size.h"
 #include <AK/RefPtr.h>
-#include <AK/Retainable.h>
+#include <AK/RefCounted.h>
 
 class CharacterBitmap : public RefCounted<CharacterBitmap> {
 public:
diff --git a/SharedGraphics/Font.h b/SharedGraphics/Font.h
index 7d126b8486..a63b035b8b 100644
--- a/SharedGraphics/Font.h
+++ b/SharedGraphics/Font.h
@@ -3,7 +3,7 @@
 #include <AK/AKString.h>
 #include <AK/MappedFile.h>
 #include <AK/RefPtr.h>
-#include <AK/Retainable.h>
+#include <AK/RefCounted.h>
 #include <AK/Types.h>
 #include <SharedGraphics/Rect.h>
 
diff --git a/SharedGraphics/GraphicsBitmap.h b/SharedGraphics/GraphicsBitmap.h
index 0f077a6fec..426dffa860 100644
--- a/SharedGraphics/GraphicsBitmap.h
+++ b/SharedGraphics/GraphicsBitmap.h
@@ -6,7 +6,7 @@
 #include <AK/AKString.h>
 #include <AK/MappedFile.h>
 #include <AK/RefPtr.h>
-#include <AK/Retainable.h>
+#include <AK/RefCounted.h>
 #include <AK/StringView.h>
 #include <SharedBuffer.h>