Peregrine, 3rd Duke of Ancaster & Kesteven

General Peregrine Bertie, 3rd Duke of Ancaster and Kesteven, 3rd Marquess of Lindsey, 6th Earl of Lindsey, 19th Baron Willoughby de Eresby.

Gained the rank of Major-General on 19 January 1755, Lieutenant-General on 3 February 1759 and General on 25 May 1772.

General Peregrine Bertie, 3rd Duke of Ancaster and Kesteven, 3rd Marquess of Lindsey, 6th Earl of Lindsey, 19th Baron Willoughby de Eresby PC (1714 – 12 August 1778) was the son of Peregrine Bertie, 2nd Duke of Ancaster and Kesteven.

He married, firstly, Elizabeth Blundell, on 22 May 1735. He married, secondly, Mary Wynn Panton, on 27 November 1750. They had four children:

   Lady Georgina Charlotte Bertie (d. 1838), married George Cholmondeley, 1st Marquess of Cholmondeley and had issue.

   Peregrine Thomas Bertie, Marquess of Lindsey (1755–1758), died young.

   Robert Bertie, 4th Duke of Ancaster and Kesteven (1756–1779)

   Priscilla Barbara Elizabeth Bertie, Baroness Willoughby de Eresby (16 February 1761 – 29 December 1828 )

On the death of his father in 1742, he succeeded him in the dukedom and as Lord Great Chamberlain and Lord Lieutenant of Lincolnshire, and was appointed to the Privy Council.

He gained the rank of Major-General on 19 January 1755, Lieutenant-General on 3 February 1759 and General on 25 May 1772.