Albemarle Bertie, 9th Earl of Lindsey
Lieutenant-General Albemarle Bertie, 9th Earl of Lindsey (17 September 1744 – 17 September 1818) was a British nobleman and general.
He was the son of Peregrine Bertie, a barrister and great-great-grandson of Montagu Bertie, 2nd Earl of Lindsey.
Thomas Butler, 10th Earl of Ormond
Thomas Butler, 10th Earl of Ormonde, 3rd Earl of Ossory, Viscount Thurles( c. 153122 November 1614), was an Irish peer and the son of James Butler, 9th Earl of Ormond and Lady Joan Fitzgerald daughter and heiress- general of James FitzGerald, 10th Earl of Desmond.
He was Lord Treasurer of Ireland and a very prominent personage during the latter part of the 16th century.
Alexander Leslie-Melville, 10th Earl of Leven
Alexander Leslie- Melville, 10th Earl of Leven, 9th Earl of Melville( 1817 – 1889)
He was the son of John Leslie- Melville, 9th Earl of Leven.
He was a partner in Williams.
Deacon& Co, and was a Representative Peer for Scotland( Conservative) from 1880 to 1889.
He was succeeded by his half- brother Ronald Ruthven Leslie- Melville, 11th Earl of Leven, 10th Earl of Melville( 1835 – 1906).
Montague Bertie, 12th Earl of Lindsey
Montague Peregrine Albemarle Bertie, 12th Earl of Lindsey, DL( 3 September 1861 – 2 January 1938), styled Lord Bertie from 1877 until 1899, was an English nobleman, the only son of Montague Bertie, 11th Earl of Lindsey.
He was educated at Eton and Magdalene College, Cambridge.
On 30 March 1881, he was appointed a second lieutenant in the Northampton and Rutland Militia( later the 3rd Battn, The Northamptonshire Regiment).
Between 1885 and 1888, he served as an aide- de- camp to Lord Carrington, then Governor of New South Wales.
While in Australia, Lord Bertie met and on 12 February 1890 married Millicent Cox( d. 1931), daughter of the surgeon Dr. James Charles Cox, by whom he had one daughter: Lord Bertie was promoted captain on 29 June 1889, and resigned his commission on 4 May 1891.
On 8 September 1893, he was appointed a deputy lieutenant of Lincolnshire.
In 1899, he succeeded his father as Earl of Lindsey.
Upon his death, the Earldom of Lindsey passed to his fifth cousin thrice removed, the 8th Earl of Abingdon, while the Irish titles of Baron and Viscount Cullen( which he never claimed) became extinct.
George Bertie, 10th Earl of Lindsey
George Augustus Frederick Albemarle Bertie, 10th Earl of Lindsey, DL (4 November 1814 – 21 March 1877) was the eldest son of Albemarle Bertie, 9th Earl of Lindsey.
George was styled Lord Bertie from his birth until his accession to the earldom in 1818.
Lindsey was of "weak intellect", and posed something of a family problem.
After a visit by Lindsey in 1841, George Cruikshank wrote to Charles Dickens (who had given Lindsey a note of introduction) to comment that his wife had at first thought Lindsey "either drunk or mad".
As a consequence, his public life was very limited, although on 10 August 1849, he was made a Deputy Lieutenant of Lincolnshire.
Upon his death in 1877, he was succeeded by his brother Montague Bertie.
Albert George Brighton
Albert George" Bertie" Brighton( 1900 – 1988) was a British museum curator and palaeontologist.
Gilbert Talbot, 3rd Baron Talbot
Gilbert Talbot, 3rd Baron Talbot( c. 1332–1387) was an English nobleman and soldier.
He was the grandfather of John Talbot, 1st Earl of Shrewsbury.
Ralph Neville, 3rd Earl of Westmorland
Ralph Neville, 3rd Earl of Westmorland( c. 1456 – 6 February 1499) was an English peer.
He was the grandfather of Ralph Neville, 4th Earl of Westmorland.
John Talbot, 10th Earl of Shrewsbury
John Talbot, 10th Earl of Shrewsbury, 10th Earl of Waterford( 1601 – 8 February 1654), was an English nobleman.
Montagu Bertie, 2nd Earl of Lindsey
Montagu Bertie, 2nd Earl of Lindsey, KG, PC( 1608 – 25 July 1666) was an English soldier, courtier, and politician who sat in the House of Commons between 1624 and 1626.
He was created Baron Willoughby de Eresby by writ of acceleration in 1640 and inherited the peerage of Earl of Lindsey in 1642.
He fought in the Royalist army in the English Civil War.

Question: Who is the paternal grandfather of George Bertie, 10Th Earl Of Lindsey?
Answer: Peregrine Bertie