Duke of Ancaster

Earldom of Lindsey held with Earldom of Abingdon
Arms of Bertie, Earls of Lindsey: Argent, three battering rams, barwise in pale proper, armed and garnished azure
Creation date	1626
Monarch	Charles I
Peerage	Peerage of England
First holder	Robert Bertie, 1st Earl of Lindsey
Present holder	Richard Bertie, 14th Earl of Lindsey, 9th Earl of Abingdon
Heir apparent	Henry Bertie, Baron Norreys
Subsidiary titles	Baron Norreys
Seat(s)	Gilmilnscroft House
Armorial motto	Loyalteé me oblige (Loyalty binds me)

Earl of Lindsey is a title in the Peerage of England. It was created in 1626 for the 14th Baron Willoughby de Eresby (see Baron Willoughby de Eresby for earlier history of the family). He was First Lord of the Admiralty from 1635 to 1636 and also established his claim in right of his mother to the hereditary office of Lord Great Chamberlain of England. Lord Lindsey fought on the Royalist side in the Civil War and was killed at the Battle of Edgehill on 23 October 1642. He was succeeded by his son, the second Earl. He also fought at Edgehill and surrendered to the Parliamentarians in order to attend his mortally wounded father. Lord Lindsey later fought at the First Battle of Newbury, Second Battle of Newbury, and at Naseby. His son from his second marriage, James, was created Earl of Abingdon in 1682. He was succeeded by his son from his first marriage to Martha Cockayne, the third Earl. He represented Boston in the House of Commons and served as Lord Lieutenant of Lincolnshire.

His son, the fourth Earl, was summoned to the House of Lords in 1690 through a writ of acceleration in his father's junior title of Baron Willoughby de Eresby. He later served as Chancellor of the Duchy of Lancaster and as Lord Lieutenant of Lincolnshire and was one of the Lords Justices before the arrival of King George I. In 1706 he was created Marquess of Lindsey and in 1715 he was further honoured when he was made Duke of Ancaster and Kesteven. Both titles were in the Peerage of Great Britain. His son, the second Duke, was called to the House of Lords in 1715 through a writ of acceleration as Baron Willoughby de Eresby. He later served as Lord Lieutenant of Lincolnshire. He was succeeded by his son, the third Duke. He was a General in the Army and served as Master of the Horse from 1766 to 1778. He was also Lord Lieutenant of Lincolnshire. His son, the fourth Duke, was briefly Lord Lieutenant of Lincolnshire but died unmarried in 1779 at an early age. On his death the barony of Willoughby de Eresby fell into abeyance between his sisters Lady Priscilla and Georgiana, Marchioness of Cholmondeley, who also jointly inherited the office of Lord Great Chamberlain (the abeyance was terminated in 1780 in favour of Priscilla; see the Baron Willoughby de Eresby for later history of this title).