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Last name Koessler (Koessler
, Kössler
) , all around the world, is quite a rare family name. The family name Koessler is habitual in Western Europe, particularly Austria, where it is quite a common surname, France, where it is quite a rare surname, and Switzerland. Measured by absolute frequency, the name is most common in Western Europe, particularly Austria, Germany, and France. Much less frequently, Koessler is the forename as well as the last name.