Hester Stanhope, Viscountess Mahon

Hester Stanhope, Viscountess Mahon (19 October 1755 – 20 July 1780), formerly Lady Hester Pitt, was the wife of Charles Stanhope, Viscount Mahon, later the 3rd Earl Stanhope.
She was the eldest daughter of William Pitt, 1st Earl of Chatham, by his wife, the former Hester Grenville (1720–1803), herself the daughter of the 1st Countess Temple. She was thus the sister of William Pitt the Younger, who, like their father, served as Prime Minister of the United Kingdom. She may have been born at the Pay Office, which was at the time her parents' residence.
Hester married Viscount Mahon on 19 December 1774. They had three children:
Their London house was in Harley Street. Following the birth of her third daughter, Lady Hester suffered from puerperal fever, and was taken to Chevening for her health. She died there, aged 24, and was buried at St Botolph's Church, Chevening.
Stanhope remarried in 1781 to Louisa Grenville, his first wife's first cousin. He inherited his father's title in 1786, his older brother having predeceased him.