Other
- James Bass Mullinger, 19th century author who used Theodore as a pen name
- Theodore Racing, Formula One racing team
- Theodore Seville, member of the fictional music group "Alvin and the Chipmunks"
- Theodore Huxtable, character on the television series The Cosby Show
- Theodore "T-Bag" Bagwell, character on the television series Prison Break
- Principality of Theodoro, principality in the south-west Crimea from the 13th to 15th centuries.
- Theodore Roosevelt (1858 - 1919), 26th President of the United States of America.
Read more about this topic: Theodore