Family name Dù (Yu 
, Dù 
) , globally, is a prevalent last name. The surname Dù is habitual in Mongolia, where it is a prevalent surname, Cayman Islands, where it is a widespread surname, and Hong Kong (explore the name in all countries). In absolute terms, it most frequently occurs in China, Mongolia, and Myanmar. Much less frequently, Dù is the forename as well as the last name.