I have a George Mair and Jean Watson in my family tree, however the OPR I have gives the date of the marriage as 2/3/1815.
I visited the gravestone quite recently in Cullen Old Kirkyard, the writing is illegible but I have a MI giving the following details.
Sacred to the memory of George Findlay late Seaman in Cullen, who departed this life 27 May 1809, aged 77 years. This stone is erected by his affectionate spouse, Janet Wood, as a mark of respect. Janet Wood, above named, died 5 April 1813, aged 77 years; in memory of thier son Captain John Findlay, late of the Cape of Good Hope, who died at Cullen 22 March 1851 aged 73 years.
Next to their tombstone is one which has the following transcription.
In memory of James Mair, Seaman, Portknockie, who died 20 January 1833 aged 17 years. This stone is erected by George Mair and Jean Watson in testimony of their affection for a much loved son; also of their daughter Hellen Mair, who departed this life on 22nd day of March 1839, aged 17 years; and of their son, John Mair who died 25 March 1857 aged 26 years.
My father John Watson Mair (b 7.5.1927) son of George Mair (15/8/1900) and Jessie Ann Mair Findlay (b 31/5/1903) is named after Jean Watson, his gr/gr aunt.
If you think there is a connection I have more information which I am willing to share with you.