In the Didot-Perceval, a pagan ally of Lucius the Roman is known simply as “the Amiraut”, or “the Emir”. One manuscript calls him the Sultan.
Lucius had married his daughter. The Amiraut was slain by Gawaine during the Roman War.
The Roman Empire | The Legend of King Arthur
Sultan | The Legend of King Arthur
Didot-Perceval | c. 1220-1230