Kerry
I too am searching for a Matthew Pelan. I've assumed it's not the same one as you, but now I don't know, as the information seems confusing. l
My g-grandfather John Pelan was born in Lisburn in about 1858, and on his marriage certificate he says his father was John Pelan, tailor. I cannot find any other references to them anywhere. However, I have a lot of DNA matches to what I believe are two sisters called Thompson, and their parents were Alexander Thompson and Mary Pelan. Mary was born in Lisburn in 1823, the daughter of Matthew Pelan, and married Charles McIlwrath. As I have so many matches to her, she must have been a close relation of John snr - a sister, or at most a cousin. I have found what I believe are other children of Matthew's, as his name appears on their marriage certificates - William born 1820 who married Margaret Chapman in Lisburn in 1850, Arthur who married in Belfast in 1866, and Ann, born in Lisburn in 1926, who married William Taylor.
I have found someone on a different site who has the same Matthew and Elizabeth in her tree as you. She has their children as William 1818 (Lambeg) and Matthew Addison Pelan, whom she is descended from. She thinks the family may have emigrated in the 1840s.
I haven't found these births, but what seems odd to me is this: Matthew son of William is in the McCabe list, but according to it he is single. He can't be Matthew Addison Pelan who was too young in 1829 to be included, but Matthew snr was married with children - who are not mentioned, nor is Elizabeth, either in Canada or Ireland.
So - were there two Matthews, or one? If there were two, which was the father of my Mary, as she was born in in 1823, so it could have been either. And, as my Matthew doesn't seem to have a son called John, is there any chance your John is the one I'm looking for, unlikely as it seems?
Any information you have would be appreciated!