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, Saudi Arabia, India, Pakistan, Iraq |
| Nayaf | Saudi Arabia, Kuwait, United States, India, Canada |
| Найаф | Armenia, Russia |
| Naiaf | United States, Saudi Arabia |