Surname تيودور (Theodor 
, Teodor , Théodore 
, among others...) , across the world, is a common cognomen. The surname تيودور is characteristic of Poland, where it is quite a common surname, Romania, and North Macedonia (explore the name in all countries). In absolute terms, it is the most numerous in Poland, Romania, and Indonesia. More prevalently, تيودور is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Theodor, Teodor | Poland, Romania, South Africa, Germany, Indonesia |
| Théodore | Poland, Cameroon, Ivory Coast, United States, Germany |
| Theodorus | Poland, South Africa, United States, Germany, Indonesia |
| Теодор | Serbia, Kazakhstan, Bulgaria, Russia, Ukraine |
| Teodors | United Kingdom, Brazil, United States, Latvia |
Fedor, Feodor, Fiodor, Fiódor, Fjodor, Fyodor, Fëdor, Jeriko, Teodoro, Theo, Theodore, Theodoros, Theodōros, Théodoros, Tivadar, Tudor, Turdor, Vox, Θεόδωρος, Теодоро, Теодорос, Теодору, Теодорус, Тивадар, Федор, Федя, Федір, Феодор, Фьодор, Фёдар, Фёдор, Хведір, פיודור, תאודור, תאודורוס, תיאודור, تئودور, ثيودور, فيودور, and 西奥多