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Family name Guðni (Guðni , גודני ) , throughout the world, is an extremely rare last name. The family name Guðni is habitual in Western Asia, particularly Israel, where it is a rare surname. Much more frequently, Guðni is the forename as well as the last name.
Thor, Hjörleifsson, Oddgeirsson, Ólafsson, Þorvaldsson, Þorsteinsson, Matthíasson, Sigurðsson, Pétursson, Davíðsson, Guðmundsson, Grétarsson, Halldórsson, Walderhaug, Ágústsson, Ásgeirsson, Sigurjónsson, Kristinsson, Ragnarsson, Gunnarsson, Haraldsson, Þórarinsson, Hannesson, Þórðarson, Eiríksson, Erlendsson, Valur, Þór, Lárusson, Ægisson, Sæmundsson, Pálsson, Leifsson, Jónsson, Tómasson, Harðarson, Hauksson, Helgason, Oddsson, Björnsson, Kárason, Guðnason, Guðjónsson, Guðfinnsson, Gíslason, Jónasson, Thorarensen, Einarsson, and Kristjánsson