His son Sir George Rawdon, 1st Baronet settled in the village of Moira, County Down.

In 1808 he succeeded his mother in the baronies of Hastings, Botreaux, Hungerford and de Moleyns.

In 1816 he was created Viscount Loudoun, Earl of Rawdon and Marquess of Hastings in the Peerage of the United Kingdom.

Lord Hastings married Barbara Yelverton, 20th Baroness Grey de Ruthyn.

He died aged only seventeen and was succeeded by his younger brother, the fourth Marquess.