Cognomen Олкай (Олкай 
) , in all the world, is an extremely rare last name. The surname Олкай is habitual in Central Asia, particularly Kyrgyzstan, where it is a very rare surname, and Kazakhstan. Much less frequently, Олкай is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Олкай | Kyrgyzstan, Kazakhstan, Ukraine |