Surname Terlak (Terlak 
) , in the world, is a very rare family name. The family name Terlak is habitual in Greece, where it is a very rare surname, and the United States, where it is an extremely rare surname. More prevalently, Terlak is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Terlak | Poland, Pakistan, Greece, United States |