Cognomen Найаф (Najaf 
, Nayaf 
, Найаф 
) , all over the world, is quite a rare last name. The cognomen Найаф is characteristic of Western Asia, particularly Bahrain, where it is quite a rare surname, Azerbaijan, and Kuwait. Not in comparison with a country's population, it is commonest in Iraq, Pakistan, and India. More frequently, Найаф is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Najaf | Azerbaijan, Pakistan, Iraq, Saudi Arabia, India |
| Nayaf | Kuwait, Canada, United States, Saudi Arabia, India |
| Найаф | Russia, Armenia |
| Naiaf | Saudi Arabia, United States |