Cognomen Заинуллаев (Заинуллаев 
) , all over the world, is an extremely rare family name. The last name Заинуллаев is habitual in Eastern Europe, particularly Russia, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Заинуллаев | Russia |
Zainullaev, and Zaynullaev