Sigurd Jonsson

Sigurd Jonsson (1390s–1452) was a Norwegian nobleman and knight, descended through the Sudreim family from King Haakon V. After the council deposed King Erik in 1440, he ruled Norway as drottsete during the interregnum, until Christopher of Bavaria was crowned in 1442. He commanded Akershus Fortress and led Norway's anti-Hanseatic policies.

When Christopher died in 1448, he again guarded the realm, declined the crown himself, and backed Christian I. Part of the council crowned the Swedish king Karl Knutsson instead, but Sigurd resisted him in southern Norway; Karl abandoned his claim and Christian was crowned in 1450.