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Family name Arnþór (Arnthor , Arnþór ) , all around the world, is an extremely rare surname. The cognomen Arnþór is habitual in Southern Europe, particularly Spain, where it is an extremely rare surname. Much more prevalently, Arnþór is the forename as well as the last name.
Ingi, Stefánsson, Sigurðsson, Þorvarðsson, Elíasson, Gíslason, Guðjónsson, Axelsson, Guðmundsson, Sævarsson, Örlygsson, Hjaltason, Jónsson, Pálsson, Arnarson, Barðdal, Addó, Magnússon, and Tryggvason