Question: What is the date of death of George Waldegrave, 5Th Earl Waldegrave's mother?
Answer: 29 January 1816

His titles then passed to his brother, John. Elizabeth Laura Waldegrave, Countess Waldegrave (25 March 1760 – 29 January 1816), was a British noblewoman, courtier and society beauty. She served at court as a Lady of the Bedchamber to Charlotte, Princess Royal, eldest daughter of King George III