- Born on January 24, 1758
- Deceased on February 3, 1844, at the age of 86 years
Parents
- William Ponsonby (1704 - 1793), Earl of Bessborough
- Caroline Cavendish (1719 - 1760)
Family
- Married on November 27, 1780, with Henrietta Frances Spencer (1761 - 1821), issuing
- John William (1781 - 1847)
- Frederick Cavendish (1783 - 1837)
Caroline (1785 - 1828)- William Francis (1787 - 1855)