Cognomen Fajan (Fajan 
, Фаян 
) , in all the world, is a rare surname. The surname Fajan is habitual in Saudi Arabia, where it is a rare surname, Brazil, where it is a very rare surname, and Malaysia, where it is an extremely rare surname. Not in comparison with a country's population, this name is the most popular in India, Brazil, and Saudi Arabia. More frequently, Fajan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Fajan | Brazil, Pakistan, India, Nigeria, Saudi Arabia |
| Фаян | Kazakhstan, Russia |