Inquiry about possible distant Norwegian ancestor

A number of resources list a Sigrid Haftoresdatter (born in Iceland around 1194, died in Norway around 1275) and Holte Jonsson (born around 1180, died in Norway around 1240). My question has to do with whether one of their two sons, a Bjørn Holtesson (sometimes listed as Bjørn "Kamp" Holtesson) ever had children. And if so, what were their names? I ask because there appears to be a lot of confusion in the online records between a Bjørn "Kamp" Holtesson and a Bjørn Ulvhendinson Kamp (from the same area in the same century but with different birth/death dates: 1140-1185). Apparently, Bjørn "Kamp" Holtesson died in a shipwreck near the Faroe Islands in 1240, when he was 60 years old. And I believe he was married to a Ragnhild Audensdatter (1220-1290). Anyway, if anyone could help answer the key question--whether Bjørn "Kamp" Holtesson and Ragnhild Audensdatter were actually a couple with children, and a lead to those children's names (if possible), I would be grateful. I'm at a crossroads in my family tree. If it turns out that Bjørn "Kamp" Holtesson never had children, then the information on my family tree that connects my Norwegian-American family back to Sigrid Haftoresdatter and Holte Jonsson is either wrong or terribly unreliable. On the other hand, if I can get answers that definitely link my family to this couple, then I could add important evidence to the family tree. Here are some links to help anyone get started and begin to grapple with the confusion: https://jrho.no/getperson.php?personID=I10717&tree=jrh1 https://jrho.no/getperson.php?personID=I10842&tree=jrh1 https://jrho.no/getperson.php?personID=I10843&tree=jrh1 This is where it gets really confusing: https://www.myheritage.com/names/bj%C3%B8rn_ulvhendinson%20kamp And this last online source lists various variations on Amund Björnsson Kamp as a possible descendant of Bjørn "Kamp" Holtesson (on my family tree it's Agmund Bjornsson), but I have trouble making sense of it all: https://www.myheritage.com/names/amund_bj%C3%B6rnsson%20kamp And to further complicate things, someone posted a note to the Bjørn "Kamp" Holtesson entry (family tree) that Bjørn "Kamp" Holtesson's alternate name was Tord Assurson. That person added a link to this page, but I'm not clear how that information proves that claim: http://slekt.ostby.priv.no/getperson.php?personID=I1152&tree=ostbyslekt The same person claimed that Bjørn "Kamp" Holtesson's mother, Sigrid Haftoresdatter, had the alternate name of Gunnhild Gunnarsdatter, adding this link: http://slekt.ostby.priv.no/getperson.php?personID=I1154&tree=ostbyslekt Likewise, I'm not clear on how the above resources supports that claim. Apologies for all of the confusing examples, but that's why I need help making sense of it all.