Delio is an Italian origin given name, derived from the Latin word 'delius', meaning 'of Delos'. Delos was a small Greek island, legendary as the birthplace of the god Apollo and his twin sister Artemis. The name gained popularity in Italy during the Middle Ages and has since been used predominantly in Italian-speaking regions. Delio is sometimes confused with the Spanish given name 'Delfo', which also has roots in ancient Greek mythology but refers to a different deity.
"The name Delio experienced varying popularity throughout the 20th century and into the 21st, with a total of 98 children being given this name over this period."