Cassius

Latin, "hollow"

Muhammad Ali won his first fight on October 29, 1960, when he was still named Cassius Clay, which he later denounced as his “slave name”. Cassius Marcellus Clay Jr. and his father were named after the 19th century abolitionist. An Ancient Roman name with Shakespearean credentials, Cassius is one of the fastest-rising names on Nameberry, along with siblings Cassian, Cassia, and Caspian. Nicknames can be Cass or Cash.