for Preston, but was soon forced to leave the House of Commons for the House of Lords after receiving a writ of acceleration as Baron Willoughby de Eresby. Lord Willougby inherited the earldom of Lindsey on his father's death in 1701, and was invested a Privy Counsellor one month later; along with the Earldom of Lindsey, he also inherited the offices of Lord Great Chamberlain and Lord Lieutenant of Lincolnshire, both of which he would hold until his death and would pass onto his son, the 2nd Duke of Ancaster and Kesteven. Lord Lindsey, as he was now styled, was then created Marquess of Lindsey in 1706, and was finally created Duke of Ancaster and Kesteven in 1715, with a special remainder failing the heirs male of his body, to the heirs male of the body of his father, Robert, late Earl of Lindsey, by Elizabeth his wife, daughter of Philip, Lord Wharton. Also in 1715, he temporarily served as a Lord Justice. In 1715, he employed Sir John Vanbrugh to design a baroque front to his house at Grimsthorpe to celebrate his ennoblement as first Duke of Ancaster and Kesteven. Personal life On 30 July 1678, Lord Willoughby married Mary Wynn (d. 1689), a Welsh heiress and direct descendant of the princely house of Aberffraw. She was the daughter, and sole heiress, of Sir Richard Wynn, 4th Baronet of Gwydyr Estate and the former Sarah Myddelton (daughter of Sir Thomas Myddelton of Chirk Castle). They had five children, including: Robert Bertie, Lord Willoughby (1683–1704), who died while studying at the Wolfenbüttel Ritter-Akademie Peregrine Bertie, 2nd Duke of Ancaster and Kesteven (1686–1742), who married Jane Brownlow, third daughter of Sir John Brownlow, 3rd Baronet. Lady Elizabeth Bertie, who died unmarried. Lady Eleanor Bertie, who died unmarried. Lady Mary Bertie, who died unmarried. After the death of his first wife in 1689, he married Albinia Farington on 6 July 1705. She was a daughter of Maj.-Gen. William Farington of Chislehurst and the former Theodosia Betenson (sister and co-heiress of Sir Edward Betenson, 1st Baronet). Together, they were the parents of: Lord Vere Bertie (d. 1768), an MP for Boston who married Ann Casey, illegitimate daughter of Sir Cecil Wray, 11th Baronet, in 1736. Capt. Lord Montagu Bertie (d. 1753), who married Elizabeth Piers, daughter of William Piers, MP in 1758. Capt. Lord Thomas Bertie (1720–1749) Lt.-Gen. Lord Robert Bertie (1721–1782), the