Julius is a Roman family name of uncertain origin, usually explained from the Greek ioulos, "downy-bearded", or linked to Jupiter; Julius Caesar is its most famous bearer and July is named after him. Basketball legend Julius "Dr. J" Erving is a well-known American Julius. The name has ranked in the US top 1000 all century, peaked at number 302 in 2007 and stands at number 424 in 2025.