Last name Sigurbjorg (Sigurbjorg 
) , around the globe, is an extremely rare cognomen. Much more frequently, Sigurbjorg is the forename as well as the last name.
Sears, Sigurdardottir, Johannesdottir, Gunnarsdottir, Thormundsdottir, Danielsdottir, Bjornsdottir, Bergthorsdottir, Magnusdottir, Sigurjonsdottir, Thorgrimsdottir, Jonsdottir, Canpolat, Magnúsdóttir, Ardottir, Njalsdottir, Laxfoss, Boone, Smith, Bjarnadottir, and Kristjansdottir