Hello. I do not have a lot of information on the grandparents except that they were married in Muirkirk on 26.07.1811. David was a furnaceman at the Ironworks. Isabella come from Coltburn. I believe that their children were: William, Isabel, Mary, Robert, David. Sometime between 1820 and 1845 they seem to have settled in Glasgow.
John Miller Armour, Isabelle's father was the child of James Armour and Catherine White.
Is this any use? I would be very interested to know if you have a David Gorman listed in your findings who was a commersial traveller and lived in 28 Parsons St Glasgow in 1869.