Cognomen ハマー (Hamer 
, Hammer , ハマー 
) , across the world, is a common surname. The family name ハマー is characteristic of Norway, where it is quite a common surname, Austria, and Denmark (explore the name in all countries). In absolute terms, it is the most numerous in the United States, Germany, and the United Kingdom. Much less frequently, ハマー is the forename as well as the last name.