Cognomen كولك (Kolk 
, كولك 
) , globally, is quite a common surname. The cognomen كولك is characteristic of Estonia, where it is quite a common surname, Netherlands, and Germany, where it is quite a rare surname. In absolute terms, it most frequently occurs in Netherlands, Germany, and the United States. Much less frequently, كولك is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kolk | Germany, Estonia, United States, Poland, Netherlands |
| كولك | Iran, Yemen, Sudan, Palestinian Territory, Syria |