Isobel was born 24 Oct 1761 Grange, Banff to Joseph Bruce and Jean Ord.
I note with great interest that Joseph Bruce and Jean Ord's banns were called in both Botriphnie and Grange. Their second daughter was Helen and their third son was John.
Jean Ord, daughter of John Ord and Helen Burgess, was born at Upper Towie, Botriphnie and baptised on 22 January 1732.
I wonder whether the baptisms of any of the Bruce children were witnessed by anyone from Botriphnie? If so, then it would be reasonable to suppose that Jean Ord's parents were John Ord and Helen Burgess. Just a thought.
Also Joseph and Jean named their eldest daughter Margaret and their second son George. Might this point to Joseph being the son of George Bruce and Margaret Allan, who was baptised in Grange on 23 November 1723?