Cognomen Dōk (Douk 
, Dōk) , globally, is a rare family name. The cognomen Dōk is habitual in Morocco, where it is quite a rare surname, Algeria, where it is a rare surname, and Greece. Not in comparison with a country's population, the name is most common in Morocco, Algeria, and the United States. Much less frequently, Dōk is the forename as well as the last name.