On 20 Aug 1663 Nicholas Barnewall 1st Viscount Barnewell (age 71) died. His son Henry Barnewall 2nd Viscount Barnewall succeeded 2nd Viscount Barnewall, 2nd Baron Turvey.

On 01 Jun 1688 Henry Barnewall 2nd Viscount Barnewall died. His son Nicholas Barnewall 3rd Viscount Barnewall (age 20) succeeded 3rd Viscount Barnewall, 3rd Baron Turvey. Mary Hamilton Viscountess Barnewall by marriage Viscountess Barnewall.

On 14 Jun 1725 Nicholas Barnewall 3rd Viscount Barnewall (age 57) died. His son Henry Barnewall 4th Viscount Barnewall (age 17) succeeded 4th Viscount Barnewall, 4th Baron Turvey.

In 1774 Henry Barnewall 4th Viscount Barnewall (age 66) died. His nephew George Barnewall 5th Viscount Barnewall 1758–1800 (age 16) succeeded 5th Viscount Barnewall, 5th Baron Turvey.

In 1800 George Barnewall 5th Viscount Barnewall 1758–1800 (age 42) died. Viscount Barnewall, Baron Turvey dormant.

In 1834 Matthew Barnewall 6th Viscount Barnewall died. Viscount Barnewall, Baron Turvey extinct.