Who was that ``Duke Knut'', Cecilia's historically mentioned father? Three sufficiently possible and credible alternatives have been proposed: * Knut Birgersson Jarl has been deemed somewhat uneasy choice because of chronological problems. That Knut died 1208, and because of her children's age and her own likely death date, Cecilia firstly need to have been born in the very end of Knut's life (c 1208) when Knut was already elderly (and several decades after birth of that Knut's other attested child/children); and even that makes Cecilia somewhat old for her own marriage and to give birth to her attested children, at last one of whom was executed in 1280 and Cecilia possibly was then living.
Knut
Cecilia