Surname Еркінбай (Еркінбай 
) , in the world, is a very rare last name. The family name Еркінбай is habitual in Central Asia, particularly Kazakhstan, where it is a very rare surname. More prevalently, Еркінбай is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Еркінбай | Kazakhstan, Ukraine |