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Family name Walch (Walch , Вальх , וולך ) , throughout the world, is a common last name. The surname Walch is habitual in Liechtenstein, where it is a common surname, British Virgin Islands, where it is quite a common surname, and Austria. Measured by absolute frequency, the name is most common in Germany, Austria, and the United States. Very seldom, Walch is the forename as well as the last name.