RootsChat.Com

Thank you so much for responding.  I am a young mother of four children and so my time is so limited but I have been able to do a little bit of research lately.  I live in the United States-- in Idaho.  My g-g-g-g-g grandmother is Janet Smith, daughter to Alexander and Isabel.    Janet married James Riddel (18 Jun 1802 in Borthwick).  I have been researching the Riddel line for a while and came to a dead end so I decided to see what I could find out about Janet.  I also came across Isabel's parents as possibly John Chisholm and Jean Cleugh but there's also another possibility of Isabel with parents John Chisholm and Janet Grieve with Isobel born 21 Oct 1742 in Borthwick.  I conversed with a lady in Australia a few years ago who also shares this line and she really thinks it is John and Jean even though like you pointed out, it puts Isabel really young to marry.  I have been searching on scotlandspeople.gov.uk on the death records for Isobel to see if I could find her and any possible leads that way but I haven't been able to find her death record.   I don't know how else to go about confirming her parents. 

I have been searching for more information on Alexander Smith and Isobel Chisholm (married 15 May 1773 in Borthwick).  Looking specifically for Isobel's parents.  Noticed that there was a post here with their names.