Re the link between Alexander (Sandy) Peden and Hugh Peden.
I have just finished reading "Prophet Of The Covenant" by Robert Watson M.A., B.D. who taught Classics and History in the Glasgow area. Near the end of the book, Sandy visits his brother, Hugh and his wife Marion. No definite proof other than that the author had a post as Historical Researcher on Old Glasgow, which gave him valuable experience of detailed investigation to research the Covenanting story of 17th century Scotland.