Wow! Thank you!
That painting looks like the photo I found on here a while back, but can't locate it now. However, if looks are any indicator, this was not the right Joseph J Gyalog because my son and I have very dark hair and eyes. It's hard to believe, but there are actually two, but a Joseph J. Gyalog lived in Tennessee based on the records I have found.
This feels so strange searching for this information for my son. I never had any desire to do any searching, and really still don't, until he asked. But, I know this is important to him and will continue. He also has no desire to interrupt any lives and will not contact anyone even if locate biological relatives, but he loves history and hates it that he doesn't know anything at all about this side of his biological roots.
Thank you again!