- Born on January 26, 1744
- Deceased on June 6, 1814, at the age of 70 years
Parents
- John Montagu (1718 - 1792), Earl of Sandwich, amiral, secrétaire d'État pour le département du Nord
- Dorothy Fane (1717 - 1797)
Family
- Married with Mary-Henrietta Powlett, issuing
- George (1773 - 1818)