Guthorm was the son of Sigurd Helgesson Hjort and Thyrna Haraldsdotter. The date and place of his birth have not been found.
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Sigurd Helgesson Hjort |
Helge de Ringerike |
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Sigurd II Ragnarsson |
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Helena Bieja Ellusdottir av England |
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Thyrna Haraldsdotter |
Harald Klakk Halvdansson |
Halvdan Haraldsson |
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Sigrid Helgesdotter |
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