It seems that the article Sigambrer which which is linked from here talks about exactly the same people by different names. This was also the conclusion reached, based on internet searching by the adamsan on the reference desk. I think other article should be merged into this one. However, along with adamsan, I don't feel competent to make that judgement for sure. Could someone with a little more confidence in this area do the merge, remove the link or explain what's going on please.