Family name Estak (Estak 
) , all around the world, is a very rare last name. The cognomen Estak is characteristic of Croatia, where it is a very rare surname, Philippines, and India, where it is an extremely rare surname. More frequently, Estak is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Estak | Philippines, United States, India, Saudi Arabia, Croatia |