Umur of Aydın

Umur Ghazi (c. 1309–1348), called Umur the Lion, was the second bey of Aydın, a Turkish beylik on the Aegean coast of Anatolia, ruling from 1334. His power was his navy: at its height Aydın had 350 ships and 15000 men. His raids on Christian shipping led Pope Clement VI to proclaim the Smyrniote Crusade against him in 1343.

He was a loyal friend of the Byzantine emperor John VI Cantacuzenus in the civil war of 1341–1347, and sent up to 380 ships and 28000 men to his aid.

In 1348 a Venetian, Hospitaller and Cypriot fleet destroyed his navy, and Umur was killed by arrows while climbing the walls of Smyrna castle in an attempt to retake it. John mourned him, and Umur's elder brother Hızır succeeded him.