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Family name Guðmundur (Guðmundur , Гудмундур ) , in all the world, is an extremely rare surname. The family name Guðmundur is habitual in Northern Europe, particularly Iceland, where it is quite a rare surname. Much more prevalently, Guðmundur is the forename as well as the last name.
Arason, Þorsteinsson, Sigurðsson, Stefánsson, Kjartansson, Pétursson, Guðmundsson, Jakobsson, Jóhannesson, Halldórsson, Hafsteinsson, Hermannsson, Ágústsson, Ásgeirsson, Sigurjónsson, Björgvinsson, Kristinsson, Ragnarsson, Gunnarsson, Gunnlaugsson, Guðbjörnsson, Haraldsson, Þorvaldsson, Ólafsson, Óskarsson, Ingólfsson, Pálsson, Jensson, Jónsson, Harðarson, Hauksson, Helgason, Hreinsson, Árnason, Magnússon, Sverrisson, Benediktsson, Sveinsson, Björnsson, Bjarnason, Karlsson, Guðlaugsson, Guðjónsson, Gíslason, Jóhannsson, Einarsson, Eiríksson, Hannesson, Baldursson, and Kristjánsson