Crossword clues for the word: LEONIDAS The word LEONIDAS has appeared as an answer to at least 7 crossword clues on different crossword puzzles. Crossword clues for LEONIDAS Showing 1 to 7 of 7 results Clue(s) Defender of Thermopylae Heroic king of Sparta. King at 18 25 one Christmas needing boost King of Sparta King of Sparta killed at the Battle of Thermopylae in 480 BC King who faught in the Battle of Thermopylae Spartan king