William Henry Monckton-Arundell (1749-1774)
William Henry Monckton-Arundell died at a young age and was unable to match the accomplishments of the previous two Viscounts. Since he did not marry and have any male heirs, the title passed on to his brother, Robert Monckton-Arundell.
William Henry Monckton-Arundell, the third Monckton Viscount Galway and Baron Killard.