Guthorm SIGURDSSON 
Guthorm's father was SIGURD SOW HALFDANSSON and his mother was ASTRID (Asta de Ringerike) de UPLANDS. His paternal grandparents were HALFDAN SIGURDSSON and N.N. de GRENLAND; his maternal grandparents were GUDBRAND KULE de UPLANDS and GUNHILD (Ulfrida) THORASDOTTIR. He had two brothers and three sisters, named HARALD III KING, HALFDAN, Gunnhild, Ingrid and INGIRITH SIGURDSDOTTIR. He had a half-brother named OLAF II (ST) KING.
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