Sigurd was the son of Sven II Estridsson Ulfsson and Gunhilde Svendsdottir. The date and place of his birth have not been found.
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Sven II Estridsson Ulfsson |
Ulf Thorgilsson |
Torkel Styrbjörnsson |
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Estrid Margarete Svendsdotter |
Svend I Otto Haraldsson |
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Świętosława |
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Gunhilde Svendsdottir |
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Éric VI Björnsson |
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Świętosława |
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