The name of a number of early saints and martyrs, an 8th C Byzantine saint, an 8th C Coptic pope, a 9th C Byzantine saint, a 9th C pope, a 13th C Russian prince and saint, two 13th Byzantine emperors, and a 16th C tsar of Russia.
 
  
  
  Not to be confused with Theodoric.
There exists a Slavic calque, Bogdan.
  
  
- England
 
- 
- Latin
 
- ● 1222 Theodorus (nom) StPaulDom p. 61,
 theodorum (acc) ibid. p. 61
 
- Walloon
 
- ● 1593 Theodor RWC p. 27;
 1596/7 Theodore ibid. p. 45
 
 
- France
 
- 
- Latin
 
- ● 814 Teodorus (nom) StVdM-II F2
 
- Middle French
 
- ● 1563 Théodore RegPCC-1 p. 21
 
 
- Italy
 
- 
- Latin
 
- ● 1179 Theodorus (nom) CartHaut 25
 
- Italian
 
- ● 1513x1521 Theodoro LeoX p. 11
 
 
- Poland
 
- 
- Latin
 
- ● 1234 theodorus (nom) CDT1 XIV
 
 
- Ukraine
 
- 
- Latin
 
- ● 1469 Fedor (nom) AGZ-18 17
 
 
Cite as: J. Uckelman, S.L. Uckelman. "Theodore". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2023, no. 1. http://dmnes.org/2023/1/name/Theodore.