Family name داك (Dak 
, Dack 
, داك ) , in the world, is a common last name. The surname داك is habitual in Morocco, where it is quite a common surname, Sudan, where it is quite a rare surname, and Lebanon. Not in comparison with a country's population, the name is most common in Morocco, India, and Sudan. Likewise, داك is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Dak | Sudan, Turkey, United Kingdom, India, Morocco |
| Dack | Sudan, United States, Turkey, United Kingdom, India |
| داك | Sudan, Morocco |