Magnus IV of Sweden
In 1320, Erengisle's father Sune and uncle Peter obtained the effectively hereditary position of chatelain of Viipuri castle in easternmost coast of Finland by purchasing it from the governor. It was set there by the deposed king Birger of Sweden. Peter and Sune recognized the new king, Magnus IV of Sweden, and received important privileges, which effectively turned their holding of Viipuri as an independent feudal fief, the start of a veritable margraviate (see fief of Viipuri).