Caesar \ca(e)-sar\ as a boy's name is pronounced SEE-zer. It is of Latin origin, and the meaning of Caesar is "head of hair". Clan name of obscure meaning, possibly from "caesaries" meaning "hair". Caesar was the title of the Roman emperors after Augustus Caesar. Czar (Russian) and Kaiser (German) are variant forms. Saint Caesarius (fourth century) was physician to two emperors.
For more information, see also the related name King.