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Last name Mortier (Mortier
, Morter
, Mortir
) , worldwide, is a common surname. The cognomen Mortier is characteristic of Western Europe, particularly Belgium, where it is quite a common surname, Monaco, and France, where it is quite a rare surname. Not in comparison with a country's population, it most frequently occurs in France, Belgium, and the United States. Much less frequently, Mortier is the forename as well as the last name.