Cognomen Kljuce (Kljuce 
) , all around the world, is a very rare family name. The cognomen Kljuce is habitual in Croatia, where it is a very rare surname, Australia, and Germany. Measured by absolute frequency, it most frequently occurs in Germany, Australia, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Kljuce | Germany, Australia, Croatia, United States, Venezuela |