Across the world, تيودور (Theodor 
, Teodor , Théodore 
, among others...) is a common masculine forename. The first name تيودور is characteristic of Romania, where it is quite a common male name, Germany, and Bulgaria (explore the name in all countries). Not in comparison with a country's population, this name is the most popular in Germany, Romania, and Indonesia. Very seldom, تيودور is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Teodor, Theodor | Germany, Indonesia, Romania, South Africa, Poland |
| Théodore | Germany, Ivory Coast, United States, Poland, Cameroon |
| Theodorus | Germany, Indonesia, South Africa, United States, Poland |
| Теодор | Kazakhstan, Russia, Serbia, Bulgaria, Ukraine |
| Teodors | Brazil, United Kingdom, 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
تيودور is also a prevalent name for the fictitious and mythical characters: Ted Mosby , the fictional character from the television series How I Met Your Mother; Eric Cartman , the fictional character from South Park; Laurie , the fictional character from Louisa May Alcott's Little Women; Ted Kord , the superhero who was originally published by Charlton Comics and later picked up by DC Comics, Smallville and Ted Grant , the DC Comics superhero, Smallville, and in many other works.