Cognomen Kciku (Kciku 
) , across the world, is a very rare family name. The family name Kciku is habitual in Finland, where it is a rare surname, Australia, where it is a very rare surname, and the United Kingdom, where it is an extremely rare surname. Measured by absolute frequency, it is the most numerous in Finland, Australia, and the United States. Much less frequently, Kciku is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kciku | Australia, United States, United Kingdom, Finland |