He had no children and the title became an additional title of the Marquess of Lansdowne, descendants of his uncle John Petty, 1st Earl of Shelburne.
John Petty, 1st Earl of Shelburne (1706–1761), politician, father to former Prime Minister of Great Britain, William Petty, 2nd Earl of Shelburne
John F. Kennedy | Pope John Paul II | Elton John | John | John Lennon | John Wayne | John McCain | John Kerry | John Cage | Olivia Newton-John | John Williams | John Peel | John Adams | John Steinbeck | John Travolta | John Milton | John Zorn | John Marshall | John Howard | John Singer Sargent | John Ruskin | John Updike | John Maynard Keynes | John Coltrane | John Cleese | St. John's | John Waters | John Lee Hooker | John Huston | John Ford |
John Petty, 2nd Marquess of Lansdowne (1765–1809), son of former Prime Minister of Great Britain, William Petty, 1st Marquess of Lansdowne