Still on FS.
James Whyntie / Margt. Fraser married (might be date Banns read) in Grange, Banffshire on 20 Jun 1807.
They had a number of children, one of whom was your Margaret's brother, John Whyntie b1811 (MY RELATIVE!!!! by marriage - the father of the girl I mentioned right at the beginning of the thread!!!!).
I'm not allowed to post a copy of the actual record on here because of copyright, but the attached is a screenshot of part of John's death record in 1899 showing his parents as James Whyntie and Margaret Fraser.
I'm calling it quits at that for now as it is after 5am here now - I need to get some shut-eye.
I'll get back to you later today or tomorrow once I collate all this info, get it on my tree and check my own records.
If you wish, we can exchange email addresses by PM so that I can give you access to my tree and also send you any documents I might have.
I won't have much yet because the Whyntie family are my "in-laws" rather than blood family. My link is through John Whyntie's wife, Hellen Anderson (her father is my ggggf).
This is quite exciting finding this. I wouldn't have bothered looking at the Whyntie side for years yet because it's in-laws rather than direct family. All because I happened to recognise the unusual name from your post!
I might take a stroll around the block, make a coffee and just stay awake now. It'll be light in a couple of hours anyway.