To my knowledge, not one source show his COA, so what is the sensational source for this COA? His name by modern historians is (Bjälboätten) inside brackets, he was never called Folkungaätten in any source, unless anyone can provide such? from this family, I have read some over optimistic claims that one was born, and died, in a Monastery, that a group of members of the family was named Folkungaätten and Folkunga as birth-name which is completely untrue, and I think Theres a need to increase the level of serious genealogy approach.
Here are a couple of sources from Wikipedia on COA for this family. Let me know if you have a better source for the correct COA for Magnus Bengtsson Minneskold. If your a COA expert, then you should have the ability to upload and correct COA on these profiles.
https://sv.m.wikipedia.org/wiki/Magnus_minnesk%C3%B6ld
https://sv.m.wikipedia.org/wiki/Folkunga%C3%A4tten
Gerene, It IS me who uploaded the COA as well as editing the article and as you can see here https://sv.wikipedia.org/w/index.php?title=Magnus_minnesk%C3%B6ld&a... I created the first version of the article in 2002-12-07T06:12:47