Theodo, also spelled Theoto or Thioto, is a masculine given name of Germanic origin. It may refer to:
Theodo of Bavaria, duke (), sometimes called Theodo I or Theodo II Theodo (son of Tassilo III), co-ruled Bavaria with his father (), sometimes called Theodo II Theoto (died 834), archchancellor under Louis the Pious Thioto (abbot of Fulda) () ()
See also Teuto