Cognomen Kulkus (Kulkus 
) , all around the world, is a very rare surname. The last name Kulkus is characteristic of Czechia, where it is a rare surname, Australia, where it is a very rare surname, and the United States, where it is an extremely rare surname. Very seldom, Kulkus is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kulkus | United States, India, Czechia, Australia |