Sigvaldi Strut-Haraldsson
Jarl Sigvaldi was the semi-legendary chieftain of the fabled Jomsvikings and commander of their stronghold, Jomsborg. He succeeded Palnatoke as the leaders of the Jomsvikings in the late 10th century. The character of Sigvaldi remains largely enigmatic. As a leader, he was said to be more wily than brave despite leading such a powerful force.
Biography
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.
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. When Sweyn went aboard Sigvaldi's ship, he was captured by the Jomsvikings. To be liberated, the Danish king had to agree to grant independence to both the Jomsvikings and to the Wends, in addition to paying a king's ransom. In further negotiations, it was agreed that Sweyn would marry Gunhild of Wenden, the daughter of Burislav, while Burislav would marry Sweyn's sister Tyri.