Surname Damnum (Dam 
, Damnum 
, Dëm) , across the world, is a common family name. The surname Damnum is characteristic of Netherlands, where it is quite a common surname, Denmark, and Iceland (explore the name in all countries). Not in comparison with a country's population, it is the most numerous in India, Netherlands, and Vietnam. Very seldom, Damnum is the forename as well as the last name.