The name Leonidas is a boy's name of Greek origin meaning "lion". Leonidas is ranked #497 on our popularity charts and is often added to lists like Unique Baby Names: Unusual and rare and discussed in our forums with posts like "A brother or sister for little Jack or Olivia".
From the experts:
Leonidas is an ancient name that has started rising again along with centuries-old names such as Augustus and Cato. The original Leonidas was the most famous of Sparta's warriors, sacrificing his life at the Battle of Thermopylae; there is also a saint Leonidas. More stately than Leon, more melodious than Leonard, Leonidas is a leonine name that commands respect. In Portuguese, Spanish, and French, the name is pronounced lee-OH-nee-dus, but Americans tend to say lee-oh-NYE-dus.