John Manners, 4th Earl of Rutland
John Manners, 4th Earl of Rutland( c. 1559 – 24 February 1588) was the son of Henry Manners, 2nd Earl of Rutland, and Lady Margaret Neville, daughter of Ralph Neville, 4th Earl of Westmorland.
Wulfnoth Cild
Wulfnoth Cild( died c. 1014) was a South Saxon thegn who is regarded by historians as the probable father of Godwin, Earl of Wessex, and thus the grandfather of King Harold Godwinson.
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.
Charles Colyear, 2nd Earl of Portmore
Charles Colyear, 2nd Earl of Portmore, KT( 27 August 1700 – 5 July 1785), known as Lord Milsington to 1730, of Portmore House, Weybridge, Surrey, was a British Whig politician who sat in the House of Commons between 1726 and 1730, when he succeeded to the peerage as Earl of Portmore.
He subsequently became a Scottish representative peer in the House of Lords.
He was a racehorse owner and was known as Beau Colyear for his conspicuous dress.
David Colyear, 1st Earl of Portmore
General David Colyear, 1st Earl of Portmore( c. 1656 – 2 January 1730) was a Scottish general and Governor of Gibraltar.
Thomas Colyear, 4th Earl of Portmore
Thomas Charles Colyear, 4th Earl of Portmore
(27 March 1772 – 18 January 1835), styled Viscount Milsington from 1785 until 1823, was a British politician.
Lord Portmore was the son of William Colyear, 3rd Earl of Portmore and succeeded him to his titles upon his death.
He was married twice; in 1793 he married Lady Mary Elizabeth Bertie (d. 1797), daughter of Brownlow Bertie, 5th Duke of Ancaster and Kesteven, by whom he had a son:
In 1828 Lord Portmore married Frances Murrells, by whom he had no issue.
Lord Portmore was a Member of Parliament (MP) for the borough of Boston in Lincolnshire from 1796 to 1802.
Vere Essex Cromwell, 4th Earl of Ardglass
Vere Essex Cromwell, 4th Earl of Ardglass PC( I),( 2 October 1625 – 26 November 1687) was an English nobleman, son of Thomas Cromwell, 1st Earl of Ardglass and Elizabeth Meverell.
Eleanor Holland, Countess of Salisbury
Eleanor Holland, Countess of Salisbury( 1386- after 1413), was an English noblewoman, the daughter of Thomas Holland, 2nd Earl of Kent, a half- brother of King Richard II of England.
She was the first wife of Thomas Montagu, 4th Earl of Salisbury.
One of her brothers was Edmund Holland, 4th Earl of Kent, to whom she was co-heiress.
She is not to be confused with her eldest sister Alianore Holland, Countess of March who bore the same name.
William Colyear, 3rd Earl of Portmore
William Charles Colyear, 3rd Earl of Portmore (1745–1823) was a Scottish peer, styled Viscount Milsington until 1785.
He was the second but only surviving son of Charles Colyear, 2nd Earl of Portmore, and his wife Juliana.
He was styled Viscount Milsingtion in 1756 on the death of his brother David.
Milsington was educated at Eton and St John's College, Cambridge.
In 1774, he unsuccessfully contested the constituency of Evesham as a Tory.
On 5 November 1770, he married Mary Leslie (1753–99), second daughter of the 10th Earl of Rothes.
Their children included:
The deaths of the couple's two daughters, Lady Mary and Lady Julia, in Bath, within three hours of one another on the same day in 1800, were the subject of a poem by Mary Young Sewell.
Like his father the earl, Viscount Milsington was a racehorse owner; he and his wife were regular racegoers.
His grey mare, Tiffany, won the 50 l. weight-for-age race at Salisbury Races in 1780 and his horse Scarf ran in the 1781 Derby.
He succeeded as the 3rd Earl of Portmore on the death of his father in 1785.
He died in London in 1823 and was succeeded by his son Thomas Charles Colyear, 4th Earl of Portmore.

Question: Who is Thomas Colyear, 4Th Earl Of Portmore's paternal grandfather?
Answer: Charles Colyear, 2nd Earl of Portmore