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Worldwide, Crass (Cras , Crassus , Crass ) is a rare predominantly female, but scarcely masculine first name. The given name Crass is habitual in Sub-Saharan Africa, particularly the Democratic Republic of the Congo, where it is a rare girly name. More prevalently, Crass is the last name as well as the forename.
Crass is also a name for the fictitious and mythical characters: Klas Svensson , the fictional character of the Bert Diaries; Claes Waltin ; Klaas Guts and Klaas Vermeulen .