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