Family name Gasak (Gasak 
) , in all the world, is a rare cognomen. The surname Gasak is habitual in Poland, where it is a very rare surname, Argentina, and Indonesia. Not in comparison with a country's population, it is the most numerous in Indonesia, Poland, and the United States. Likewise, Gasak is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gasak | Argentina, United States, Poland, Iraq, Indonesia |