Julio is the Spanish form of Julius, the Roman family name of Julius Caesar, which is usually explained as "downy-bearded", that is, youthful, from the Greek ioulos. The singer Julio Iglesias gave the name an international audience in the 1970s and 1980s. In the United States Julio was number 256 in 2000, peaked at 227 in 2005 and has gradually eased to 641 in 2025.