Cognomen Tanjak (Tanjak 
) , in all the world, is a rare last name. The cognomen Tanjak is habitual in South-eastern Asia, particularly Indonesia, where it is a very rare surname, and Thailand. Very seldom, Tanjak is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Tanjak | India, Indonesia, Malaysia, Thailand |