Family name Sofja (Софья 
, Sofja 
, Софя 
) , all over the world, is quite a rare last name. The family name Sofja is characteristic of Armenia, where it is quite a common surname, Kyrgyzstan, where it is quite a rare surname, and Moldova. Not in comparison with a country's population, this name is the most popular in Russia, Armenia, and Kyrgyzstan. Predominantly, Sofja is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Софья | Kyrgyzstan, Russia, Kazakhstan, Belarus, Moldova |
| Sofja | Azerbaijan, Germany, Russia, Estonia, Latvia |
| Софя | Kyrgyzstan, Russia, Bulgaria, Ukraine, Armenia |
| Софйа | Russia |