Last name Jancuska (Jancuska 
) , throughout the world, is a rare surname. The family name Jancuska is characteristic of Slovakia, where it is quite a rare surname, the United States, where it is a very rare surname, and the United Kingdom, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Jancuska | United States, Slovakia, United Kingdom |