Robert Bertie, 1st Duke of Ancaster and Kesteven

His Grace The Duke of Ancaster and Kesteven PC
Portrait of Lord Ancaster by Godfrey Kneller
Lord Great Chamberlain
In office 1701–1723
Preceded by	The Earl of Lindsey
Succeeded by	The Duke of Ancaster and Kesteven
Chancellor of the Duchy of Lancaster
In office 1689–1697
Preceded by	Robert Phelips
Succeeded by	The Earl of Stamford
Member of Parliament for Preston
In office 1690–1690 Serving with Christopher Greenfield
Preceded by	James Stanley Thomas Patten
Succeeded by	Christopher Greenfield Sir Edward Chisenhall
Member of Parliament for Boston
In office 1685–1690 Serving with Peregrine Bertie, Sir William Yorke
Preceded by	Sir Anthony Irby Sir William Yorke
Succeeded by	Sir William Yorke Peregrine Bertie
Personal details
Born	Robert Bertie (1660-10-20)20 October 1660
Died	26 July 1723(1723-07-26) (aged 62)
Political party	Tory
Spouses	Mary Wynn ​ ​ (m. 1678; died 1689)​ Albinia Farington ​ ​ (m. 1705)​
Children	10, including Peregrine, 2nd Duke of Ancaster and Kesteven
Parent(s)	Robert Bertie, 3rd Earl of Lindsey Hon. Elizabeth Wharton
Relatives	Peregrine Bertie (brother) Philip Bertie (brother) Albemarle Bertie (brother) Montagu Bertie, 2nd Earl of Lindsey (grandfather) Philip Wharton, 4th Baron Wharton (grandfather)

Robert Bertie, 1st Duke of Ancaster and Kesteven PC (20 October 1660 – 26 July 1723), styled 17th Baron Willoughby de Eresby between 1666 and 1701, and known as 4th Earl of Lindsey between 1701 and 1706, and as 1st Marquess of Lindsey between 1706 and 1715, was a British statesman and nobleman.