Definitions of Cyrus:

• noun:   Persian prince who was defeated in battle by his brother Artaxerxes II (424-401 BC)
• name:  A male given name (rare: 1 in 14285 males; popularity rank in the U.S.: #796)
• name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #7766)