Thomas Hay, 7th Earl of Kinnoull

He was a descendant of Peter Hay of Rattray, Perthshire (younger brother of George Hay, 1st Earl of Kinnoull) and Margaret Boyd.^[1] Thomas Hay was a Tory member of the Scottish parliament for Perthshire between 1693 and 1697. He was created Viscount Dupplin on 31 December 1697. He resided at the family seat of Balhousie Castle.^[2]

William Hay, 6th Earl of Kinnoull, a supporter of King James II and VII, resigned his titles after the king's abdication. William was given a life peerage by Queen Anne and upon his death on 10 May 1709, the titles passed to Thomas.

He was a commissioner for the Union of English and Scottish Parliaments in 1707. He sat in the First Parliament of Great Britain as one of 16 representative peers between 1710 and 1714.^[3]

The earl and his heir were briefly imprisoned in Edinburgh Castle on suspicion of Jacobite sympathies during the 1715 uprising.^[2]

He married Elizabeth, daughter of William Drummond, 1st Viscount Strathallan, on 20 December 1683. They had five children:^[2]

1. Lady Margaret Hay (30 September 1686 – 26 April 1707), married John Erskine, 6th Earl of Mar on 6 April 1703
2. Lady Elizabeth Hay (d. 1723), married James Ogilvy, 5th Earl of Findlater
3. George Henry Hay (23 June 1689 – 28 July 1758), married Lady Abigail Harley, daughter of Robert Harley, 1st Earl of Oxford and Earl Mortimer.
4. William Hay, died before 1711
5. John Hay of Cromlix (1691–1740) created the Earl of Inverness, married Marjorie Murray, sister to William Murray, 1st Earl of Mansfield.