Allan C & Janet G had a number of Children around the turn of the 18th century at St Quivox (Ayrshire, Scotland) one was John (my ancestor) and another was Charles. I have found a refernce to Charles (or at least to a son of Charles by the same name) He was listed in the 1851 census (aged 38 born at St Quivox) with his wife Elizabeth (aged 36 born at Stair)and their 6 children. He was listed as a coalminer and they were living in a "colliers row" at Perceton near Dreghorn.
As many of the family seem to have emigrated from Scotland it might be a clue for someone to "hook in". I will post the names and approximate years of birth of their children tonight.