Motivation for a few of my changes   I removed the wording early th century historians as the impression I get is most later historians has accepted their view and decided that the matter has been laid to rest For example Dick Harrison in Jarlens sekel discusses the family of Birger jarl but does not even mention the fact that Ingrid Ylva could have had royal blood He does mention Sune Sik as a donor to Vreta Abbey though but in a completely unrelated chapter He also makes it clear that the donation was signed in  so I removed recorded which made it sound like it could have been made earlier  Also Id prefer if this article was moved to just Sune Sik which seems to be the most common in Swedish history writing and doesnt suggest that Sune was actually the son of Sverker