Leonidas is a moderately popular boys' name in United States, ranking #446 in 2021 with 687 recorded births. The name reached its all-time peak in 2022 with 758 births ranking #421. Since 1996, the popularity has increased by 6,770.0%. In 2021, approximately 1 in every 2,545 boys born was named Leonidas. FALLING Recent data shows the name is currently falling.