- OsmanSynonym of Ottoman (“member of the Ottoman dynasty”).
- UsmanA male given name from Arabic.
- UthmanUthman bin Affan, third Islamic caliph and a companion of Muhammad.
- Ottoman EmpireA large former Turkish empire which began as a sultanate centered in modern Turkey and at its height ruled over much of Southeastern Europe, West Asia and North Africa; founded in the late 13th century, it lasted until the 1920s.