I note your post #1 - John McGibbon b.1793 Paisley
Currently I'm trying to research my GGG-grandparents James MacDonald(McDonald) and Janet McGibbon. Their son (also James ) was born in Paisley-Scotland in 1817. Would estimate Janet McGibbon was born mid 1790's however to date I have been unable to trace her origins or her death records. It's always possible that she and her husband emigrated.
George McDonald - Scotland