Peregrine Bertie, 2nd Duke of Ancaster and KestevenPC (29 April 1686 – 1 January 1742), styledThe Honourable Peregrine Bertie between 1686 and 1704,Lord Willoughby de Eresby between 1704 and 1715 andMarquess of Lindsey between 1715 and 1723, was aBritish politician who sat in theHouse of Commons from 1708 until 1715 when he was called to the House of Lords.

Bertie was the second and eldest surviving son ofRobert Bertie, Lord Willoughby de Eresby (subsequently 4th Earl of Lindsey) and his first wife Mary Wynn, daughter ofSir Richard Wynn, 4th Baronet. He became Lord Willoughby and heir to other titles on the death of his elder brother in 1704.^[1]

At the1708 British general election Lord Willoughby was returned as aMember of Parliament forLincolnshire with his father's support. Although his father was a Whig, Willoughby acted as a Tory. He sat on a drafting committee for theBoston church bill, and a committee of inquiry into the laws excludingplacemen. He acted against the Whigs in an electoral dispute. Although nominated to the committee examining the arrangements for the trial ofDr Sacheverell, he voted against the impeachment in 1710. He was returned as a Tory at the1710 election and listed as one of the 'worthy patriots' who detected the mismanagements of the previous administration, and a 'Tory patriot' who opposed the continuation of thewar in 1711. He was also a member of theOctober Club. He sat on drafting committees for bills to build a waterworks near Boston and to help drain theAncholme Level. As aHanoverian Tory, he voted against the expulsion of Richard Steele in March 1714. He did not stand at the1715 general election but was summoned to theHouse of Lords by awrit of acceleration in his father'sBarony of Willoughby de Eresby on 16 March 1715.^[1]

He was aGentleman of the Bedchamber to George I from 1719 to 1727. In 1723, on the death of his father, he inherited the rest of the family titles, and the hereditaryGreat Office ofLord Great Chamberlain. He also inherited the Lincolnshire seats atGrimsthorpe Castle and Eresby, and the London mansion, Lindsey House, at 59-60Lincoln's Inn Fields.^[2] He was appointedLord Lieutenant of Lincolnshire in succession to his father in 1724.^[1] He was receiver of the Duchy of Lancaster rents in Lincolnshire from 1728 to his death, and Lord Warden and ChiefJustice in Eyre north of the Trent from 1734 to his death. He had a seat on theFoundling Hospital's board of governors when the charity was founded in 1739.^[1]

Lord Willougby married Jane Brownlow, daughter ofSir John Brownlow, 3rd Baronet in June 1711. Together, they were the parents of seven children:

• Peregrine Bertie, 3rd Duke of Ancaster and Kesteven (1714–1778)
• Lord Albemarle Bertie (d. 1765), a gambler and sportsman depicted byHogarth who was blinded early in his youth.
• Brownlow Bertie, 5th Duke of Ancaster and Kesteven (1729–1809)
• Lady Mary Bertie (d. 1774), who marriedSamuel Greatheed in 1747.
• Lady Albinia Bertie (d. 1754), who married Francis Beckford, in 1744.
• Lady Jane Bertie (d. 1793), who married GeneralEdward Mathew in 1743.
• Lady Caroline Bertie (d. 1744), who married George Dewar.

Lady Ancaster died on 25 August 1736. Lord Ancaster died on 1 January 1742.

His second son, Lord Albemarle, was thenatural father of AdmiralSir Albemarle Bertie (1755–1824), who was created a baronet of theNavy in 1812.^[3]

• 1686 births
• 1742 deaths
• Alumni of the University of Oxford
• Bertie family
• Barons Willoughby de Eresby
• Dukes of Ancaster and Kesteven
• Lord Great Chamberlains
• Lord-lieutenants of Lincolnshire
• Members of the Privy Council of Great Britain
• Members of the Parliament of Great Britain for English constituencies
• British MPs 1708–1710
• British MPs 1710–1713
• British MPs 1713–1715
• Freemasons of the Premier Grand Lodge of England

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