 On 20 May 1725 he married his cousin's widow, who was Katharine, daughter of Lieutenant-General William Tatton and his wife Elizabeth Bull.Their elder son was George Nevill, 1st Earl of Abergavenny.Katharine died on 4 December 1729 after giving birth to a second son and on 20 May 1732 he married Lady Rebecca Herbert, daughter of Thomas Herbert, 8th Earl of Pembroke and his wife Margaret Sawyer, with whom he had more children.