Last name תיאודור (Theodore 
, Theodor 
, תיאודור 
) , around the globe, is a common family name. The last name תיאודור is characteristic of Latin America and the Caribbean, particularly Saint Lucia, where it is a common surname, Dominica, where it is quite a common surname, and Grenada (explore the name in all countries). Measured by absolute frequency, it is commonest in the United States, Indonesia, and Cameroon. More prevalently, תיאודור is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Theodore | Cameroon, Germany, Ghana, United States, South Africa |
| Theodor | Cameroon, Germany, Indonesia, United States, South Africa |
| תיאודור | Israel |
Fedor, Feodor, Fiodor, Fiódor, Fjodor, Fyodor, Fëdor, Teodor, Teodoro, Teodors, Teuvo, Theo, Theodoro, Theodorus, Théodore, Tivadar, Теодор, Теодоро, Теодору, Теодорус, Тивадар, Федор, Федя, Федір, Феодор, Фьодор, Фёдар, Фёдор, Хведір, פיודור, תאודורוס, تيودور, ثيودور, فيودور, and 西奥多