Family name Онтаев (Онтаев 
) , in all the world, is a very rare last name. The last name Онтаев is habitual in Central Asia, particularly Kazakhstan, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Онтаев | Kazakhstan |
| онтаев, бейсен сеитович KZ (b. 1922) |
|