Henrietta Frances Ponsonby, countess of Bessborough [née Spencer] (1761-1821)
The younger sister of the Duchess of Devonshire; in 1780 she married Frederick Ponsonby,
third earl of Bessborough; Lady Caroline Lamb was their daughter.
The younger sister of the Duchess of Devonshire; in 1780 she married Frederick Ponsonby,
third earl of Bessborough; Lady Caroline Lamb was their daughter.