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Family name Pilius (Pilius , Пилюс ) , throughout the world, is a rare last name. The family name Pilius is characteristic of Lithuania, where it is quite a rare surname, Russia, where it is a very rare surname, and Israel. Not in comparison with a country's population, it is commonest in Russia, Lithuania, and the United States. Very seldom, Pilius is the forename as well as the last name.