Thanks all. Yes, I know a lot about Pierce Perkins, it's Patrick Perkins that is new to me and where the mystery lies. He is definitely also a son of Pierce Perkins, and not from either of Pierce's marriages. His family believe he was born in Glasgow Scotland on 3/3/17, but we don't know the mother. So my quest is to confirm his birth record and find out the mother.
I have found online (findmypast) a birth record of a Patrick Perkins in 1919, mother Gregory, born in Kent, which is actually where Pierce Perkins had lived, but this Patrick has a middle initial D, whereas my Patrick had a middle initial J. So this is probably a long shot. Nonetheless I will see can I get this full birth cert to see if this may be the one I'm looking for.