I am looking for information on the ancestry of John Kenneth Galbraith (american economist). My grandmother was a Galbraith from the Niagara region in Ontario, Canada and had said that he was a "cousin" of hers and that he had attended family reunions. She never said/knew what the family relationship was and I have not been able to confirm the connection from my family to his.
My Galbraith/Galbreath family comes from Argyll, Scotland:
Great Grandfather Neil Galbraith born Campbeltown/wife Lily Head
Great x 2 Grandfather Donald Galbraith born Saddell/wife Catharine McLarty
Great x 3 Grandfather Neil Galbreath born Kilberry/wife Isabella McMillan
Great x 4 Grandfather John Galbreath born Kilberry/wife Mary Sinclair
Any help would be appreciated!