Mary Hay, 14th Countess of Erroll
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Mary Hay, (Unknown – 1758) 18th Hereditary Lord High Constable and Knight Marischal of Scotland, The 14th Countess of Erroll, was the Senior Great Officer Royal Office of Scotland and Chief of the King's Household in Scotland. She received these titles in 1717. In 1745 she raised an army Buchan men for Prince Charles Edward Stuart.