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Surname Maslej (Maslej , Маслей ) , all over the world, is a rare family name. The last name Maslej is habitual in Eastern Europe, particularly Slovakia, where it is quite a rare surname, Ukraine, and Czechia, where it is a rare surname. Measured by absolute frequency, it is the most numerous in Eastern Europe, particularly Ukraine, Slovakia, and Poland. Very seldom, Maslej is the forename as well as the last name.