Surname Kułaj (Кулай 
, Kułaj 
) , in all the world, is quite a rare cognomen. The family name Kułaj is habitual in Belarus, where it is quite a rare surname, Kyrgyzstan, and Ukraine. Not in comparison with a country's population, it is commonest in Eastern Europe, particularly Ukraine, Belarus, and Russia. Likewise, Kułaj is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Кулай | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |
| Kułaj | Poland |
|
jan kułaj Polish farmer, trade unionist, PL (b. 1958) |
|