Cognomen 德克 (Dirk 
, Derk , Deck 
, along with others...) , all over the world, is a common surname. The family name 德克 is habitual in Netherlands, where it is a common surname, Curacao, where it is quite a common surname, and Belgium. In absolute terms, it is the most numerous in Netherlands, the United States, and Germany. More prevalently, 德克 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Derk, Dekker, Dirk | Germany, Belgium, South Africa, United States, Netherlands |
| Deck | Germany, Indonesia, South Africa, United States, Netherlands |
| 德克 | China |