Surname Markulak (Markulak 
) , throughout the world, is a rare last name. The cognomen Markulak is characteristic of Croatia, where it is quite a rare surname, Poland, where it is a rare surname, and Austria. Likewise, Markulak is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Markulak | Austria, Germany, Poland, United Kingdom, Croatia |