|Also Known As:||"Countess Marischal"|
|Birthplace:||Kinnoull, Perthshire, Scotland|
|Death:||Died in Stonehaven, Kincardineshire, Scotland|
Daughter of George Hay, 2nd Earl of Kinnoull and Anne Douglas
|Managed by:||Jason Scott Wills|
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About Mary Hay
Lady Mary Hay married George Keith, 7th Earl Marischal, son of William Keith, 5th Earl Marischal and Lady Mary Erskine, on 6 February 1662. She died circa November 1667. She was also reported to have died on 10 November 1701. She was buried on 6 December 1667. She was the daughter of George Hay, 2nd Earl of Kinnoull and Lady Anne Douglas. From 6 February 1662, her married name became Keith.
Note: Alternate DOD 10 November 1701.