Octavius Vernon Harcourt
Octavius Henry Cyril Vernon Harcourt( 25 December 1793- 14 August 1863) was a British naval officer.
He was the eighth son of Edward Venables- Vernon- Harcourt, Archbishop of York, and began life as Octavius Henry Cyril Vernon at Rose Castle, Cumberland.
On 15 January 1831, succeeding to the properties of William Harcourt, 3rd Earl Harcourt, the father's cousin, the family assumed the additional surname of" Harcourt".
Francis Venables-Vernon-Harcourt
Colonel Francis Venables-Vernon-Harcourt (6 January 1801 – 23 April 1880) was a British Conservative Party politician.
Augustus George Vernon Harcourt
Augustus George Vernon Harcourt FRS( 24 December 1834 – 23 August 1919) was an English chemist who spent his career at Oxford University.
He was one of the first scientists to do quantitative work in the field of chemical kinetics.
His uncle, William Vernon Harcourt( 1789 – 1871), founded the British Association for the Advancement of Science.
Leveson Venables-Vernon-Harcourt
The Venerable Leveson Venables- Vernon -Harcourt( b 20 March 1788 – 26 July 1860) was Archdeacon of Cleveland from 3 December 1828 until 27 October 1832.
He was the son of Edward Venables- Vernon- Harcourt, born at Sudbury, Derbyshire.
He matriculated at Christ Church, Oxford in 1806, graduating B.A. in 1810, and M.A. 1813.
He was for many years Chancellor of the Diocese of York.
George Venables-Vernon, 1st Baron Vernon
George Venables-Vernon, 1st Baron Vernon (9 February 1709 – 21 August 1780), was a British politician.
Vernon was the son of Henry Vernon, of Sudbury, Derbyshire, and his wife Anne, daughter and heiress of Thomas Pigott by his wife Mary, sister and heiress of Sir Peter Venables, Baron of Kinderton, Cheshire.
His father died in 1719, leaving him Sudbury Hall, and in 1728 he assumed by royal licence the additional surname of Venables after he had succeeded Sir Peter Venables to Kinderton in 1715.
He sat as a Member of Parliament for Lichfield from 1731 to 1747 and for Derby from 1754 to 1762.
In 1762 he was raised to the peerage as Lord Vernon, Baron of Kinderton, in the County of Chester.
He lived at Sudbury Hall, one the country's finest Restoration mansions, which now is a Grade I listed building.
Lord Vernon was married three times and several of his descendants gained distinction.
He married firstly the Hon.
Mary, daughter of Thomas Howard, 6th Baron Howard of Effingham, in 1733.
After her death in 1740 he married secondly Ann, daughter of Sir Thomas Lee, in 1741.
After her death the following year he married thirdly Martha, daughter of Simon Harcourt, younger son of Simon Harcourt, 1st Viscount Harcourt, in 1744.
Lord Vernon died in August 1780, aged 71, and was succeeded in the barony by his son from his first marriage, George.
His second son from his third marriage, the Most Reverend the Hon.
Edward Harcourt (who assumed the surname of Harcourt) became Archbishop of York and was the grandfather of Sir William Vernon Harcourt and the great-grandfather of Lewis Harcourt, 1st Viscount Harcourt.
Lady Vernon died in 1794.
William Vernon Harcourt (scientist)
Rev. William Venables-Vernon Harcourt (1789 – April 1871) founder of the British Association for the Advancement of Science, canon residentiary of the York Cathedral, Dean of Chichester, and later rector of Bolton Percy.
Robert Harcourt (Liberal politician)
Robert Venables Vernon Harcourt( 7 May 1878 – 8 September 1962) was a British diplomat, playwright, farmer and Liberal Party politician.
Lewis Harcourt, 1st Viscount Harcourt
Lewis Vernon Harcourt, 1st Viscount Harcourt (born Reginald Vernon Harcourt; 31 January 1863 – 24 February 1922) was a British Liberal Party politician who held the Cabinet post of Secretary of State for the Colonies from 1910 to 1915.
Lord Harcourt's nickname was "Loulou".
Edward Venables-Vernon-Harcourt
Edward Venables-Vernon-Harcourt (10 October 1757 – 5 November 1847) was a Church of England bishop.
He was the Bishop of Carlisle from 1791 to 1807 and then the Archbishop of York until his death.
He was the third son of the George Venables-Vernon, 1st Baron Vernon (1709–1780), and took the additional name of Harcourt on succeeding to the property of his cousin, the last Earl Harcourt, in 1831.
Charles Anson
He was born in Stepney, the third son of George Adams of Sambrooke, later George Anson of Shugborough Hall, and Mary, the daughter of George Venables- Vernon, 1st Baron Vernon.
Anson was educated at Christ Church, Oxford.
He was Rector of both Lyng( from 1794) and Mautby( from 1804) in Norfolk, having been presented to both livings by his elder brother Thomas Anson, 1st Viscount Anson before his appointment to the Archdeaconry by his uncle Edward Venables- Vernon- Harcourt, then Bishop of Carlisle.
He died in Carlisle.

Question: Who is Edward Venables-Vernon-Harcourt's paternal grandfather?
Answer: Henry Vernon