Arius is a Greek name, Areios, that means "of Ares" or "warlike", after the god of war. History remembers Arius, the 4th-century Alexandrian priest whose teaching on the nature of Christ was condemned at the Council of Nicaea; today's parents more often reach it through Ares, Darius and Aries. Arius ranked number 5601 in 2000, peaked at number 1854 in 2021 and sits at number 2677 in 2025 with 48 boys.