I'm doing too much at once and forgetting why I'm looking at this name.
It may be we have a connection here going back a generation or two from 'your' Margaret
Robb I just remembered that I have
Robb or Rob in my own line although I've only just set out researching that line and have limited info.
My 4 x great grandmother was an Isobel
Robb (Rob on OPR of her marriage on 15 June 1789 in Drainie to Alexander Sutherland,
Robb on later documents I have).
That record shows she was "in"
Alves.
I do not have details of her birth, but using the traditional Scottish naming pattern, I suspect she is the Isobel Rob christened 1765 to William Rob and Margt. Millart.
From FamilySearch.org, William and Margt. had a number of children, 2 girls and 3 boys, christened 1760 to 1765 in Elgin:
Alexr. 1760
Elspet 1763
George 1765
Isobel 1765 (who I suspect is my 4 x g grandmother)
David 1768
This is far as I've got at this stage but it is feasible that one of the boys, or even Elspet if she had an iligitimate child, is the grandparent of your Margaret
Robb married in 1810 in
Alves, potentially making her the great niece of my ancestor.
I'm unsure when I'll have time to continue this line of research. I only started it last week but have been busy since. I hope to get back to it within the next day or so.
I'll let you know, but it would be great to know whether you find out more as we might be able to collaborate.
Dave