Viscount Longueville

Viscount Longueville was a title created twice, once in the Peerage of England and once in the Peerage of Ireland. On 21 April 1690, Henry Yelverton, 15th Baron Grey de Ruthyn was created Viscount Longueville in the Peerage of England. His son the second viscount, Talbot Yelverton, was created Earl of Sussex in 1717, with which title the viscountcy then merged, until both titles became extinct in 1799 on the death of the third Earl.

Henry Yelverton, 1st Viscount Longueville

On 1 October 1795, Richard Longfield was created Baron Longueville, of Longueville in the County of Cork, and on 29 December 1800, he was created Viscount Longueville, of Longueville in the County of Cork. Both titles were in the Peerage of Ireland. Both titles became extinct on his death in 1811.