Магнус Эрикссон
His step-mother Märta Sunadotter of Hultboda, heiress of Fogelvik, was sister of Erengisle Sunason of Hultboda, Earl of Orkney. From 1356, they supported the efforts of King Erix XII of Sweden to rise to equal rulership with, or to depose, his father King Magnus IV of Sweden.