Surname Otach (Оташ 
, Otach 
) , all around the world, is a very rare family name. The last name Otach is characteristic of Kazakhstan, where it is a very rare surname, and Brazil, where it is an extremely rare surname. Likewise, Otach is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Оташ | Kazakhstan, Russia |
| Otach | Brazil |