In the world, Šincek-Kusulja (Šincek-Kusulja 
) is an extremely rare unknown gender first name. Much more frequently, Šincek-Kusulja is the last name as well as the forename. Parts of the name also exists independently as a last name Šincek, and a last name Kusulja.
| VARIANT | COUNTRY |
|---|---|
| Šincek-Kusulja | Croatia |