Family name Haraldur (Haraldur 
, Haraldr 
) , all around the world, is a very rare surname. The family name Haraldur is habitual in Southern Europe, particularly Spain, where it is a very rare surname. Much more frequently, Haraldur is the forename as well as the last name.
Sson, Guðjónsson, Erlendsson, Einarsson, Eiríksson, Hannesson, Olafsson, ºsson, Ólafsson, Þorsteinsson, Sigurðsson, Stefánsson, Pétursson, Guðmundsson, Grétarsson, Tryggvason, Sigurdsson, Ragnarsson, Gunnarsson, Gunnlaugsson, Haraldsson, Sigurðarson, Reynisson, Karlsson, Bjarnason, Björnsson, Arson, Briem, Ksson, Rnsson, Mundsson, Lafsson, Hugosson, Olason, Shoshan, Sigfússon, Gudmundsson, Sæmundsson, Petursson, Pálsson, Leifsson, Jonsson, Jónsson, Tursson, Helgason, Magnússon, Baldursson, Bjornsson, Arnarson, and Thorsteinsson