Cognomen Kudeljnjak (Kudeljnjak 
) , across the world, is a rare family name. The last name Kudeljnjak is characteristic of Slovenia, where it is quite a rare surname, Croatia, and Colombia, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Kudeljnjak | Slovenia, Colombia, Canada, Croatia |
| albina kudeljnjak 1909 - present; Yugoslavian; Painter (b. 1909) |
|