Hi Jan, We corresponded a couple of years ago, since then have been busy and not doing any research, but I guess it's about time I got started again. I was happy that you found the parent of Emillia who marr John Barr, there were several female Cahills that I couldn't find the parentage of and Emillia was one, so I kind of just stuck them in.Also in this family I don't have a Rebecca, would appreciate what you have on her. Here are the children I have listed for John Cahill,
William born 1794 Jane born 1797 Dennis born 1799 Mary born Feb 22, 1800 Joseph born 1804 John E. born June 17, 1805 Thomas born bet 1811/15 Alexander abt 1819
the Joseph that you mention in your message I believe was the son of Philip E. Cahill, born April 18, 1793, Jefferson Co., PA marr Elizabeth Crabb, he Died in Parke Co., Indiana.So maybe that's the mix up.
Am looking forward to any new research you have found on our Cahills, and more than happy to give you any info that you might need