Sudreim claim

In the early 14th century, when it was foreseeable that the male line of Sverre dynasty would go extinct, members of the Norwegian nobility arranged the Order of succession of the kingdom together with the then-king Haakon V of Norway.

[3] Ingeborg's descendants brought the kingship to union with Sweden, Denmark, and with a variety of Northern German principalities.

[citation needed] Haakon Jonson, son of Jon Havtoreson, is recorded as having been offered the throne in 1387–88, when Olav IV had died.

Eric was also the grandson of Queen Margaret's elder sister, Ingeborg, Duchess of Mecklenburg—and thus descended from recent kings of all three countries.

[5] In 1448, when Christopher of Bavaria died, the Norwegian throne was offered to Sigurd Jonsson of Sudreim, who was a grandson and ultimately the heir of Sigurd Havtoresonn and his wife Ingebjorg Erlingsdottir of Bjarkoy—but he declined because legally King Eric was still the lawful king.