Cognomen Jir (Ujir 
, Jir 
, Жир 
) , in all the world, is quite a common family name. The family name Jir is habitual in Malaysia, where it is quite a rare surname, Ukraine, and Kazakhstan, where it is a rare surname. Not in comparison with a country's population, it is commonest in India, Malaysia, and Ukraine. Also, Jir is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ujir | Nigeria, Saudi Arabia, Indonesia, Malaysia, India |
| Jir | Nigeria, Indonesia, Malaysia, Democratic Republic of the Congo, India |
| Жир | Kazakhstan, Ukraine, Russia |