Family name Хальдун (Khaldoun 
, Haldun 
, Khaldun 
) , in all the world, is quite a common last name. The cognomen Хальдун is characteristic of Morocco, where it is quite a rare surname, Algeria, and Lebanon. Not in comparison with a country's population, it is commonest in Algeria, Morocco, and Indonesia. More frequently, Хальдун is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Khaldoun | Morocco, United Arab Emirates, Syria, Turkey, Algeria |
| Haldun | United States, Azerbaijan, Indonesia, Malaysia, Turkey |
| Khaldun | United Arab Emirates, Jordan, Indonesia, Syria, Saudi Arabia |
| Хальдун | Poland, Ukraine, Russia, Belarus |