Sigvaldi is the chief of the Jomsvikings, brother of Thorkell and the father of Helga, making him Thors' father-in-law and Thorfinn and Ylva's grandfather.


Sigvaldi had long slicked back honey-blond hair and a matching color beard. He wore fur pelts over a red outfit, gray pants, and black shoes.


Not much is known about Sigvaldi, however, he liked Thors Snorresson enough have him marry his daughter Helga.

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