Family name Hamidullin (Хамидуллин 
, Hamidullin 
) , in all the world, is a common cognomen. The surname Hamidullin is habitual in Russia, where it is quite a rare surname, Kazakhstan, and Azerbaijan.
| VARIANT | COUNTRY |
|---|---|
| Хамидуллин | Kazakhstan, Belarus, Tajikistan, Azerbaijan, Russia |
| Hamidullin | Kazakhstan, China, Estonia, United States, Russia |
Гамидуллин, Хамидуллін, and Хамідуллін