Around 1396 Robert Preston 1st Baron Gormanston died. His son Christopher Preston (age 42) succeeded 2nd Baron Gormanston.

In 1422 Christopher Preston (age 68) died. His son Christopher Preston 3rd Baron Gormanston (age 37) succeeded 3rd Baron Gormanston.

In 1450 Christopher Preston 3rd Baron Gormanston (age 65) died. His son Robert Preston 1st Viscount Gormanston (age 15) succeeded 4th Baron Gormanston.

In 1503 Robert Preston 1st Viscount Gormanston (age 68) died. His son William Preston 2nd Viscount Gormanston succeeded 2nd Viscount Gormanston, 5th Baron Gormanston.

On 21 Sep 1532 William Preston 2nd Viscount Gormanston died. His son Jenico Preston 3rd Viscount Gormanston (age 30) succeeded 2nd Viscount Gormanston, 5th Baron Gormanston.