Cognomen Mergr (Marg 
, Mergi 
, Merg 
) , around the world, is quite a rare family name. The last name Mergr is habitual in Liechtenstein, where it is quite a common surname, Iraq, where it is quite a rare surname, and Germany. Measured by absolute frequency, it is the most numerous in Germany, the United States, and Iraq. More frequently, Mergr is the forename as well as the last name.