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Family name Krzyż (Crux , Krzyż , Криж ) , in the entire world, is quite a rare last name. The surname Krzyż is characteristic of Isle of Man, where it is quite a rare surname, El Salvador, and the Dominican Republic, where it is a rare surname. Not in comparison with a country's population, the name is most common in Ukraine, the United Kingdom, and El Salvador. Very seldom, Krzyż is the forename as well as the last name.