I am having a problem determining who Knut Jonsson's wife truly is. Family Search says Katarina Bengtsdotter Folkungaaten (1275-1350); there's also Knut Jonsson Sparre who's wife is Katarina Bengtsdotter Folkungaaten (1275-1350). Geni.com has him married to Kristina Bengtsdotter (Hafridssons att- 1290-1345). I'm seeing some of these combinations in trees in ancestry.com, but am wondering if there's any way to know which is correct and if these are 3 different groups of people? Interestingly enough, some of the same ancestors are in the lineage for these groups, making me wonder if they truly are all the same people. Any ideas or help would be greatly appreciated.