- Andrew Leith Hay , Scottish soldier, politician and author
- Barry Hay , Dutch musician
- Bill Hay , Canadian ice hockey player
- Colin Hay , Scottish-Australian musician
- Danny Hay , New Zealand soccer player
- Denys Hay , British historian
- Edward Norman Hay , Canadian farmer
- Elizabeth Hay , one of several people including
- --- Elizabeth Wellesley, Duchess Of Wellington ,
- --- Elizabeth Hay , Canadian novelist
- --- Elizabeth Hay , American biologist and member of the National Academy Of Sciences
- Erin Hay , American country singer
- Garry Hay , Scottish footballer
- George Hay , one of several people including
- --- George Hay (hockey) (1898–1975), Canadian hockey forward
- --- George Hay (musician) (1895–1968), country music
- --- George Hay (writer) , founder of the Science Fiction Foundation
- --- George Hay, 1st Earl Of Kinnoull (1572–1634), Lord Chancellor of Scotland
- --- George Hay, 2nd Earl Of Kinnoull (died 1644)
- --- George Hay, 3rd Earl Of Kinnoull (died 1650)
- --- George Hay, 5th Earl Of Kinnoull (died 1687)
- --- George Henry Hay, 8th Earl Of Kinnoull (1689–1758)
- --- George Hay, 12th Earl Of Kinnoull (1827–1897)
- --- George Harley Hay, 14th Earl Of Kinnoull (1902–1938)
- --- George Hay, 8th Marquess Of Tweeddale (1787–1876), British field marshal
- ---George Hay, fictional character in the play '' Moon Over Buffalo ''
- --- George Campbell Hay , Scottish poet
- Gilbert Hay , Scottish poet
- Harry Hay , American gay rights activist
- Henry Hay , Australian swimmer
- Ian Hay
- James Hay , American politician
- James Hay, 15th Earl Of Erroll
- John Hay , American politician
- John Hay , British politician
- John MacDougall Hay , Scottish novelist
- John Charles Dalrymple Hay , British admiral
- Sir John Hay, 6th Baronet ( 1788 – 1838 ), British baronet and MP
- Lord John Hay , disambiguation
- Kathryn Hay , Australian politician
- Keith Hay , New Zealand businessman
- Louise Hay , American New Age writer
- Lucy Hay, Countess Of Carlisle
- Merle Hay , American soldier
- Oliver Perry Hay , American palaeontologist
- Robert Hay , Scottish traveller and Egyptologist
- Roy Hay , British keyboard player
- Samuel Ross Hay , American Methodist bishop
- Tom Hay , Canadian radio host
- Wellington Hay , Canadian politician
- Will Hay , British comic actor
- William Hay , British police commissioner
- William Howard Hay , American physician and writer on diet
As aristocratic family name:
- John Hay, 1st Lord Hay Of Yester (c. 1450 - 1508 )
- John Hay, 2nd Lord Hay Of Yester (d. 1513 )
- John Hay, 3rd Lord Hay Of Yester (d. 1543 )
- John Hay, 4th Lord Hay Of Yester (d. 1557 )
- William Hay, 5th Lord Hay Of Yester (d. 1586 )
- William Hay, 6th Lord Hay Of Yester (d. 1591 )
- James Hay, 7th Lord Hay Of Yester (d. 1609 )
- John Hay, 8th Lord Hay Of Yester ( 1593 - 1653 ) (became Earl of Tweeddale in 1646)
- John Hay, 2nd Earl Of Tweeddale ( 1626 - 1697 ) (became Marquess of Tweeddale in 1694 )
- John Hay, 2nd Marquess Of Tweeddale ( 1645 - 1713 )
- Charles Hay, 3rd Marquess Of Tweeddale ( 1670 - 1715 )
- John Hay, 4th Marquess Of Tweeddale ( 1695 - 1762 )
- George Hay, 5th Marquess Of Tweeddale ( 1758 - 1770 )
- George Hay, 6th Marquess Of Tweeddale ( 1700 - 1787 )
- George Hay, 7th Marquess Of Tweeddale ( 1753 - 1804 )
- George Hay, 8th Marquess Of Tweeddale ( 1787 - 1876 )
- Arthur Hay, 9th Marquess Of Tweeddale ( 1824 - 1878 )
- William Montagu Hay, 10th Marquess Of Tweeddale ( 1826 - 1911 )
- William George Montagu Hay, 11th Marquess Of Tweeddale ( 1884 - 1967 )
- David George Montagu Hay, 12th Marquess Of Tweeddale ( 1921 - 1979 )
- Edward Douglas John Hay, 13th Marquess Of Tweeddale ( 1947 - 2005 )
- Charles David Montagu Hay, 14th Marquess Of Tweeddale (b. 1947 )
- George Hay, 1st Earl Of Kinnoull (d. 1634 )
- George Hay, 2nd Earl Of Kinnoull (d. 1644 )
- George Hay, 3rd Earl Of Kinnoull (d. 1650 )
- William Hay, 4th Earl Of Kinnoull (d. 1677 )
- George Hay, 5th Earl Of Kinnoull (d. 1687 )
- William Hay, 6th Earl Of Kinnoull (d. 1709 )
- Thomas Hay, 7th Earl Of Kinnoull (d. 1719 )
- George Henry Hay, 8th Earl Of Kinnoull ( 1689 - 1758 )
- Thomas Hay, 9th Earl Of Kinnoull ( 1710 - 1787 )
- Robert Auriol Hay-Drummond, 10th Earl Of Kinnoull ( 1751 - 1804 )
- Thomas Robert Hay-Drummond, 11th Earl Of Kinnoull ( 1785 - 1866 )
- George Hay, 12th Earl Of Kinnoull ( 1827 - 1897 )
- Archibald Fitzroy George Hay, 13th Earl Of Kinnoull ( 1855 - 1916 )
- George Harley Hay, 14th Earl Of Kinnoull ( 1902 - 1938 )
- Arthur William George Patrick Hay, 15th Earl Of Kinnoull (b. 1935 )
- William Hay, 1st Earl Of Erroll (d. c. 1462 )
- Nicholas Hay, 2nd Earl Of Erroll (d. 1470 )
- William Hay, 3rd Earl Of Erroll (d. 1507 )
- William Hay, 4th Earl Of Erroll (d. 1513 )
- William Hay, 5th Earl Of Erroll (d. 1541 )
- William Hay, 6th Earl Of Erroll (c. 1521 - 1541 )
- George Hay, 7th Earl Of Erroll (d. 1573 )
- Andrew Hay, 8th Earl Of Erroll (d. 1585 )
- Francis Hay, 9th Earl Of Erroll (d. 1615 )
- William Hay, 10th Earl Of Erroll (d. 1636 )
- Gilbert Hay, 11th Earl Of Erroll (d. 1675 )
- John Hay, 12th Earl Of Erroll (d. 1704 )
- Charles Hay, 13th Earl Of Erroll (d. 1717 )
- Mary Hay, 14th Countess Of Erroll (d. 1758 )
- James Hay, 15th Earl Of Erroll ( 1726 - 1778 )
- George Hay, 16th Earl Of Erroll ( 1767 - 1798 )
- William Hay, 17th Earl Of Erroll ( 1772 - 1819 )
- William George Hay, 18th Earl Of Erroll ( 1801 - 1846 )
- William Harry Hay, 19th Earl Of Erroll ( 1823 - 1891 )
- Charles Gore Hay, 20th Earl Of Erroll ( 1852 - 1927 )
- Victor Alexander Sereld Hay, 21st Earl Of Erroll ( 1876 - 1928 )
- Josslyn Victor Hay, 22nd Earl Of Erroll ( 1901 - 1941 )
- Diana Denyse Hay, 23rd Countess Of Erroll ( 1926 - 1978 )
- Merlin Sereld Victor Gilbert Moncreiffe, 24th Earl Of Erroll (b. 1948 )
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