Cognomen Yookoh (Yookoh 
) , around the world, is a very rare family name. The last name Yookoh is characteristic of Thailand, where it is a very rare surname, and Nigeria, where it is an extremely rare surname. Likewise, Yookoh is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Yookoh | Thailand, Nigeria |