In 1649 William Brouncker 1st Viscount Brouncker (age 64) died. His son William Brouncker 2nd Viscount Brounckner (age 29) succeeded 2nd Viscount Brouckner of Lyons in Leinster.

On 05 Apr 1684 William Brouncker 2nd Viscount Brounckner (age 64) died. His brother Henry Brouncker 3rd Viscount Brounckner (age 57) succeeded 3rd Viscount Brouckner of Lyons in Leinster.

On 04 Jan 1688 Henry Brouncker 3rd Viscount Brounckner (age 61) died without issue at Sheen Priory, Richmond. He was buried in the Church of St Mary Magdalene, Richmond, Surrey. Viscount Brouckner of Lyons in Leinster extinct.