Family name Єн-Ок (Єн-Ок 
) , throughout the world, is an extremely rare surname. Much more frequently, Єн-Ок is the forename as well as the last name. Parts of the name also exists independently as a first name Єн, and a first name Ок.
| VARIANT | COUNTRY |
|---|---|
| Єн-Ок | Ukraine |