Cassius Brown (b. 2009)
son of singer Bobby Brown
Cassius Licuria (b. 2011)
son of Australian rules footballer Paul Licuria
Cassius Joseph Barton (b. 2011)
son of footballer Joey Barton
Cassius Cruz Dwyer (b. 2016)
son of soccer players Dom Dwyer and Sydney Leroux
Saint Casimir
crown prince of Poland
Casimir Pulaski
Polish soldier and politician, "the father of American cavalry"
Ernest Cashel
American,Canadian outlaw
