Family name Otjan (Otjan 
, Отян 
) , around the globe, is a rare last name. The cognomen Otjan is characteristic of Ukraine, where it is a rare surname, Russia, where it is a very rare surname, and Indonesia. Very seldom, Otjan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Otjan | Indonesia |
| Отян | Ukraine, Russia |