Henry Grey, 4th Earl of Kent
Henry Grey, 4th Earl of Kent (c. 1495 – 24 September 1562) was Earl of Kent from 1524 to his death.
He was a son of George Grey, 2nd Earl of Kent and his second wife Catherine Herbert.
His maternal grandparents were William Herbert, 1st Earl of Pembroke and Anne Devereux.
His father was previously married to Anne Woodville, a daughter of Richard Woodville, 1st Earl Rivers and Jacquetta of Luxembourg.
His only known paternal half-brother was Richard Grey, 3rd Earl of Kent.
Richard succeeded their father as Earl of Kent but wound up heavily in debt, probably through gambling, and was forced to alienate most of his property.
A good part ended up in the crown's hands; historians disagree regarding what this says about the relationship of Henry VII of England with the aristocracy.
When Richard died childless, Henry inherited the title of Earl of Kent and what was left of the associated property.
Henry tried, with little success, to reacquire the property Richard had sold, and had to live as a modest gentleman, never formally taking title as earl.
He married Anne Blennerhassett daughter of John Blennerhassett and Jane Higham.
They had two children:
Henry Grey, 6th Earl of Kent
Henry Grey, 6th Earl of Kent( 1541 – 31 January 1615) was an English peer.
He was a son of Henry Grey( 1520 – 1545) and Margaret St. John and grandson of Henry Grey, 4th Earl of Kent.
He was a younger brother of Reginald Grey, 5th Earl of Kent and an older brother of Charles Grey, 7th Earl of Kent.
He served as Lord Lieutenant of Bedfordshire from 1586 to his death.
In 1587 he was one of the official witnesses at the execution of Mary, Queen of Scots.
He was married to Mary Cotton, daughter of Sir George Cotton and Mary Onley.
There were no known children from the marriage; he was thus succeeded by his younger brother, Charles.
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.
Anthony Grey, 9th Earl of Kent
Rev. Anthony Grey (1557 – 9 November 1643) was Earl of Kent from 1639 to his death.
He was a son of George Gray by Margery, daughter of Gerard Salvaine of Croxdale.
George was the apparently only son of Anthony Gray of Brancepeth, a son of George Grey, 2nd Earl of Kent, by his second wife Katherine (or Katharine or Catherine), daughter of William Herbert, 1st Earl of Pembroke.
In 1639, Gray succeeded his childless second cousin once removed Henry Grey, 8th Earl of Kent.
Henry was a great-grandson of Henry Grey, 4th Earl of Kent, another son of the 2nd Earl.
A priest in the Church of England, Gray was rector at Aston Flamville and later Burbage.
George Grey, 2nd Earl of Kent
George Grey, 2nd Earl of Kent (1454 – 25 December 1505) was the son of Edmund Grey, 1st Earl of Kent and Lady Katherine Percy.
He was the Second Earl of Kent from 1490 to 1505.
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.
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.
Elizabeth Grey, Countess of Kent
Elizabeth Grey, Countess of Kent( née Lady Elizabeth Talbot)( 1582 – 7 December 1651) was a medical recipe collector, and the wife of Henry Grey, 8th Earl of Kent.
Henry Grey, 8th Earl of Kent
Henry Grey, 8th Earl of Kent( c. 1583 – 21 November 1639) of Wrest Park, Bedfordshire was Earl of Kent from 1623 to his death.
He was born the only son of Charles Grey, 7th Earl of Kent and his wife Susan Cotton and educated at Trinity College, Cambridge.
On 16 November 1601, at St Martin- in- the- Fields, Henry married Elizabeth Talbot( 1582 – 7 December 1651), a daughter of Gilbert Talbot, 7th Earl of Shrewsbury and Mary Cavendish.
There were no known children from this marriage.
He was knighted in 1603.
He was elected Member of Parliament for Tavistock in 1601 and knight of the shire for Bedfordshire in 1614.
He served as Lord Lieutenant of Bedfordshire from 1621 to 1627 and again from 1629 to his death.
From 1621 to 1623, Henry held the title jointly with his father Charles Grey, 7th Earl of Kent.
From 1625 to 1627 and again from 1629 to his death, he held the title jointly with Thomas Wentworth, 1st Earl of Cleveland.
He died childless and his primary title as Earl of Kent was inherited by his closest male- line relative, Anthony Grey, 9th Earl of Kent, the Rector of Burbage, Leicestershire.
Anthony was a second cousin of his father as they were both great- grandsons of George Grey, 2nd Earl of Kent.
His title of Baron Grey de Ruthyn was awarded by the House of Lords to his nephew Charles Longueville, 12th Baron Grey de Ruthyn, son of his sister Susan.
Henry Grey, 1st Duke of Kent
Henry Grey, 1st Duke of Kent, KG, PC( 16715 June 1740) was a British politician and courtier.

Question: Who is Henry Grey, 4Th Earl Of Kent's paternal grandfather?