On 15 February 1783 , he married his maternal cousin Lady Arabella Crosbie , youngest daughter of William Crosbie , 1st Earl of Glandore .
On 15 February 1783 , he had by her six daughters and five sons .
On 15 February 1783 , he married his maternal cousin Lady Arabella Crosbie , youngest daughter of William Crosbie , 1st Earl of Glandore and had by her six daughters and five sons .