John Adair m. Margaret Campbell 16 June 1842 and one of his witness was his brother-in-law, Samuel McFadden, our g+grandfather. Samuel's wife is Martha Adair.
Samuel & Martha arrived in Quebec in May 1840 from Belfast, Ireland, and contacted John and all traveled to Wolford. Samuel taught school. WHen John married, he is listed as a Blacksmith. There is supposed to be another brother, Thomas Adair, living in Canada, too. Am searching for him, also.
So through Martha Adair to your John, our family is related.