In my USA matches, I have people at a top level who are not actually related to me! I will be doing quite a lot of emailing this weekend.
We ARE beginning to think Michael Welch married Margaret Glynn and may have even lived next to John in Delaware Co. IA. I think since he was born in 1811, he was John's brother. Lillian thinks he could be his father! There is a picture of the man on Ancestry now, but the poster is not even sure who exactly it is.