Cognomen Пиатых (Pyatykh 
, Пиатых , Piatyh 
) , throughout the world, is a rare family name. The cognomen Пиатых is characteristic of Russia, where it is a very rare surname, Kazakhstan, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Pyatykh | Kazakhstan, Russia |
| Пиатых, Piatykh | Russia |
| Piatyh | United States |