Kveldulf was the son of unknown parents. The date and place of his birth have not been found.
His wife was Salbjorg Karadottir. They were married, but the date and place have not been found. Their only known child was Thorolf (?-?).
Note 1
son of Bjalfi and Hallbera Ulfsdattir, daughter of Ulf the Brave and sister of Hallbjorn Halftroll. He was thus first cousin to Ketil Trout of Halogaland and a kinsman of the latter's descendant, Ketil Trout of Namdalen.