Of what countries was Strut-Harald's half-brother the king?
Harald Bluetooth Harald "Bluetooth" Gormsson (Old Norse: "Haraldr Gormsson" , Danish: "Harald Blåtand Gormsen" , died c. 985/86) was a king of Denmark and Norway.
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.