Baronet (c. 1630 – 1684) Sir Jerome Smithson, 2nd Baronet (c. 1630 – 1684), son and heir, who married Mary Wingate, daughter and heiress of .... Wingate of Yorkshire. Sir Hugh Smithson, 3rd Baronet (1657–1729) Sir Hugh Smithson, 3rd Baronet (1657–1729), who married Elizabeth Langdale, a daughter of Marmaduke Langdale, 2nd Baron Langdale (1661–1703) of Holme in Yorkshire. His mural monument survives in Stanwick Church. He had two sons, who both predeceased him and four daughters, all nuns. Sir Hugh Smithson, 4th Baronet (c. 1714 – 1786) Sir Hugh Smithson, 4th Baronet (c. 1714 – 1786), grandson, only son of Langdale Smithson (2nd son of the 3rd Baronet) by his wife Philadelphia Reveley (whose portrait by Sir Godfrey Kneller survives), daughter of William Reveley of Newby Wiske, Yorkshire. He married Lady Elizabeth Seymour, the daughter and co-heir of Algernon Seymour, 7th Duke of Somerset (1684–1750) of Petworth House in Sussex, whose mother had been Lady Elizabeth Percy (1667–1722), the great heiress of the last Earl of Northumberland. Smithson inherited about half of the former Percy estates, includinhg Alnwick Castle in Northumberland and Syon House in Middlesex, and inherited his father-in-law's subsidiary title of Earl of Northumberland, created for him in 1749 with special remainder to Smithson, in anticipation of the Duke's death without a son and the passing of the Dukedom of Somerset to very distant Seymour cousins in Devon. In conformity with the Duke's wishes, Smithson adopted the surname Percy in lieu of his patronymic and adopted the Percy armorials. In 1766 he was created Duke of Northumberland. Despite the fact that the principal seat of Smithson, now 1st Duke of Northumberland, was at Alnwick Castle, sixty miles to the north, and that he had inherited other huge estates from his marriage, he was fond of his paternal seat of Stanwick and started to build a splendid new mansion called Stanwick Hall, half a mile to the south of the church, which he intended as a country retreat. The beck was bridged and a carriage drive was constructed to link with the neighbouring village of Aldbrough and Dere Street. The new Hall included a splendid summerhouse and was set in a deer park, as depicted in an oil painting now at Syon House by George Cuitt the Elder (1743–1818), born at nearby Moulton. Algernon Percy, 4th Duke of Northumberland (1792–1865) Stanwick became the seat of Algernon Percy, Lord Prudhoe