Parents
- George Hay (c. 1753 - 1804), Marquess of Tweeddale, lord-lieutenant of East Lothian, of Haddingtonshire
- Hannah Charlotte Maitland ( - 1804)
Family
- Married on March 28, 1816, with Susan Montagu (1797 - 1870), issuing
- William Montagu (1826 - 1911)
Occupations
- field marshal
- governor of Madras
- lord-lieutenant of East Lothian