Last name ダック (Duck 
, Dak 
, ダック 
) , across the world, is a common cognomen. The cognomen ダック is habitual in Morocco, where it is quite a common surname, Sudan, where it is quite a rare surname, and Australia. Measured by absolute frequency, this name is the most popular in Morocco, India, and the United States. Likewise, ダック is the forename as well as the last name.