Thank you, Dave.
Since posting the original message I have learned that, yes indeed, Peter's parents WERE Michael and Margaret. The news of a brother in Boston is something we did not know, so, happy surprise. I'll get on researching that straightaway.
Some additional things I've learned: Our Folans came from outside Carna, from a village called Half Mace. And, Michael Folan's father was probably called Patrick.
Are you related to these Folans, as well?
Thanks again for your reply,