Maag

The surname Maag is of German origin, derived from the Middle High German word 'mage' or 'maag', meaning 'stomach' or 'maw'. It is believed to have been a nickname for someone with a prominent stomach, a large appetite, or perhaps a person who was considered a 'stomach' in the sense of being a central or important figure in a community (though this interpretation is less common).

Over time, such nicknames often became hereditary surnames. The name is concentrated in various regions of Germany and Switzerland, indicating its historical roots in these German-speaking areas. While primarily a surname, it has occasionally been used as a given name, particularly in regions where the surname is common.