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Surname Danciu (Danciu
) , across the world, is a common family name. The cognomen Danciu is characteristic of Romania, where it is quite a common surname, Albania, where it is quite a rare surname, and Austria, where it is a rare surname. Measured by absolute frequency, it is the most numerous in Romania, the United States, and Italy. Very seldom, Danciu is the forename as well as the last name.