Cognomen Жаинаков (Жаинаков 
, Jainakov 
) , worldwide, is a very rare last name. The cognomen Жаинаков is habitual in Kazakhstan, where it is a very rare surname, Russia, and Canada, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Жаинаков | Kazakhstan, Russia |
| Jainakov | Canada |