diff --git a/doc/newsfragments/sun-keyboard-keys.bugfix b/doc/newsfragments/sun-keyboard-keys.bugfix
new file mode 100644
index 00000000..83bc952f
--- /dev/null
+++ b/doc/newsfragments/sun-keyboard-keys.bugfix
@@ -0,0 +1 @@
+Added support for additional keys on Sun Microsystems USB keyboards (https://github.com/debauchee/barrier/issues/784).
diff --git a/src/lib/barrier/key_types.cpp b/src/lib/barrier/key_types.cpp
index 49293712..43fd69b1 100644
--- a/src/lib/barrier/key_types.cpp
+++ b/src/lib/barrier/key_types.cpp
@@ -194,6 +194,12 @@ const KeyNameMapEntry kKeyNameMap[] = {
     { "Bar",            0x007c },
     { "BraceR",            0x007d },
     { "Tilde",            0x007e },
+    { "Copy",           kKeyCopy },
+    { "Cut",            kKeyCut },
+    { "Open",           kKeyOpen },
+    { "Paste",          kKeyPaste },
+    { "Props",          kKeyProps },
+    { "Front",          kKeyFront },
     { NULL, 0 },
 };
 
diff --git a/src/lib/barrier/key_types.h b/src/lib/barrier/key_types.h
index dac75e85..863dc174 100644
--- a/src/lib/barrier/key_types.h
+++ b/src/lib/barrier/key_types.h
@@ -236,6 +236,13 @@ static const KeyID		kKeySuper_R		= 0xEFEC;	/* Right super */
 static const KeyID		kKeyHyper_L		= 0xEFED;	/* Left hyper */
 static const KeyID		kKeyHyper_R		= 0xEFEE;	/* Right hyper */
 
+static const KeyID		kKeyCopy		= 0x1008EF57;
+static const KeyID		kKeyCut			= 0x1008EF58;
+static const KeyID		kKeyOpen		= 0x1008EF6b;
+static const KeyID		kKeyPaste		= 0x1008EF6d;
+static const KeyID		kKeyProps		= 0x1005EF70;
+static const KeyID		kKeyFront		= 0x1005EF71;
+
 // multi-key character composition
 static const KeyID		kKeyCompose			= 0xEF20;
 static const KeyID		kKeyDeadGrave		= 0x0300;
diff --git a/src/lib/platform/XWindowsUtil.cpp b/src/lib/platform/XWindowsUtil.cpp
index 8df588db..7d4bb638 100644
--- a/src/lib/platform/XWindowsUtil.cpp
+++ b/src/lib/platform/XWindowsUtil.cpp
@@ -1285,6 +1285,45 @@ static const KeySym s_map1008FF[] =
     /* 0xf8 */ 0, 0, 0, 0, 0, 0, 0, 0
 };
 
+// map Sun keyboard keys to KeyIDs
+// This is based on the the "Internet" keymap plus the missing keys
+// Copy/Cut/Open/Paste/Props/Front
+static const KeySym s_map1009FF[] =
+{
+    /* 0x00 */ 0, 0, kKeyBrightnessUp, kKeyBrightnessDown, 0, 0, 0, 0,
+    /* 0x08 */ 0, 0, 0, 0, 0, 0, 0, 0,
+    /* 0x10 */ 0, kKeyAudioDown, kKeyAudioMute, kKeyAudioUp,
+    /* 0x14 */ kKeyAudioPlay, kKeyAudioStop, kKeyAudioPrev, kKeyAudioNext,
+    /* 0x18 */ kKeyWWWHome, kKeyAppMail, 0, kKeyWWWSearch, 0, 0, 0, 0,
+    /* 0x20 */ 0, 0, 0, 0, 0, 0, kKeyWWWBack, kKeyWWWForward,
+    /* 0x28 */ kKeyWWWStop, kKeyWWWRefresh, 0, 0, kKeyEject, 0, 0, 0,
+    /* 0x30 */ kKeyWWWFavorites, 0, kKeyAppMedia, 0, 0, 0, 0, 0,
+    /* 0x38 */ 0, 0, 0, 0, 0, 0, 0, 0,
+    /* 0x40 */ kKeyAppUser1, kKeyAppUser2, 0, 0, 0, 0, 0, 0,
+    /* 0x48 */ 0, 0, kKeyMissionControl, kKeyLaunchpad, 0, 0, 0, 0,
+    /* 0x50 */ 0, 0, 0, 0, 0, 0, 0, kKeyCopy,
+    /* 0x58 */ kKeyCut, 0, 0, 0, 0, 0, 0, 0,
+    /* 0x60 */ 0, 0, 0, 0, 0, 0, 0, 0,
+    /* 0x68 */ 0, 0, 0, kKeyOpen, 0, kKeyPaste, 0, 0,
+    /* 0x70 */ kKeyProps, kKeyFront, 0, 0, 0, 0, 0, 0,
+    /* 0x78 */ 0, 0, 0, 0, 0, 0, 0, 0,
+    /* 0x80 */ 0, 0, 0, 0, 0, 0, 0, 0,
+    /* 0x88 */ 0, 0, 0, 0, 0, 0, 0, 0,
+    /* 0x90 */ 0, 0, 0, 0, 0, 0, 0, 0,
+    /* 0x98 */ 0, 0, 0, 0, 0, 0, 0, 0,
+    /* 0xa0 */ 0, 0, 0, 0, 0, 0, 0, 0,
+    /* 0xa8 */ 0, 0, 0, 0, 0, 0, 0, 0,
+    /* 0xb0 */ 0, 0, 0, 0, 0, 0, 0, 0,
+    /* 0xb8 */ 0, 0, 0, 0, 0, 0, 0, 0,
+    /* 0xc0 */ 0, 0, 0, 0, 0, 0, 0, 0,
+    /* 0xc8 */ 0, 0, 0, 0, 0, 0, 0, 0,
+    /* 0xd0 */ 0, 0, 0, 0, 0, 0, 0, 0,
+    /* 0xd8 */ 0, 0, 0, 0, 0, 0, 0, 0,
+    /* 0xe0 */ 0, 0, 0, 0, 0, 0, 0, 0,
+    /* 0xe8 */ 0, 0, 0, 0, 0, 0, 0, 0,
+    /* 0xf0 */ 0, 0, 0, 0, 0, 0, 0, 0,
+    /* 0xf8 */ 0, 0, 0, 0, 0, 0, 0, 0
+};
 
 //
 // XWindowsUtil
@@ -1546,6 +1585,10 @@ XWindowsUtil::mapKeySymToKeyID(KeySym k)
         // "Internet" keys
         return s_map1008FF[k & 0xff];
 
+    case 0x1009ff00:
+        // Additional Left-side keys provided by Sun Microsystems USB keyboards
+        return s_map1009FF[k & 0xff];
+
     default: {
         // lookup character in table
         KeySymMap::const_iterator index = s_keySymToUCS4.find(k);