John Delaval, 1st Baron Delaval

[2] Delaval bought his father's estates from his elder brother Sir Francis Blake Delaval (1727–1771) in exchange for an annuity, and developed the farming resources at Ford and the coal and mineral resources at Seaton.

He was created a baronet, of Seaton Delaval in the County of Northumberland, in the Baronetage of Great Britain in 1761, and in 1783 he was raised to the Peerage of Ireland as Baron Delaval, of Redford in the County of Wicklow.

[7] Delaval married twice but his only son predeceased him aged just 19, and the baronetcy and baronies became extinct on his death in 1808.

He left his second wife Susannah Elizabeth a life interest in the Ford estate, and bequeathed his estates of Seaton Delaval and Doddington to his brother Edward Hussey Delaval (1729-1814).

Seaton Delaval passed to Jacob, the son of his deceased sister Rhoda, who had been married to Sir Edward Astley of Melton Constable in Norfolk.