Cognomen 加曼 (Garman 
, 加曼 
, Gahman 
) , in the entire world, is quite a common last name. The surname 加曼 is habitual in the United States, where it is quite a rare surname, Libya, where it is a rare surname, and the United Kingdom. In absolute terms, the name is most common in the United States, the United Kingdom, and Canada. Very seldom, 加曼 is the forename as well as the last name.