[1] Sigvaldi Strut-Haraldsson was the son of Jarl Strut-Harald, who ruled over the Danish territory of Scania and the brother of Thorkell the Tall.
[2] In order to win Astrid, the daughter of the Wendish chieftain Burislav, he promised to liberate the Wends of the tribute they had to pay to the Danes.
He fulfilled his promise by sailing to Zealand where he sent the message to King Sweyn Forkbeard that he had important tidings, but had fallen ill and could not come in person to bring them to him.
[3] At the time of the funeral of his father, Strut-Harald, Sigvaldi was advised by Sweyn to join the attack on Norway to depose Haakon Sigurdsson.
[5] This article contains content from the Owl Edition of Nordisk familjebok, a Swedish encyclopedia published between 1904 and 1926, now in the public domain.