Surname Хейдари (Heydari 
, Heidari , Хейдари 
) , worldwide, is a common last name. The family name Хейдари is habitual in Iran, where it is quite a common surname, Sweden, where it is quite a rare surname, and Afghanistan. In absolute terms, this name is the most popular in Iran, Afghanistan, and the United States. Very seldom, Хейдари is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Heidari, Heydari | Iran, Germany, United States, Sweden, Afghanistan |
| Хейдари | Kazakhstan, Russia, Armenia |
| Hejdari | United States |