William Marshal, 1st Earl of Pembroke
William Marshal, 1st Earl of Pembroke (1146 or 114714 May 1219), also called William the Marshal (Norman French: ', French: '), was an Anglo-Norman soldier and statesman.
He served five English kings – Henry II, his sons the "Young King" Henry, Richard I, John, and John's son Henry III.
Knighted in 1166, he spent his younger years as a knight errant and a successful tournament competitor; Stephen Langton eulogized him as the "best knight that ever lived."
In 1189, he became the "de facto" Earl of Pembroke through his marriage to Isabel de Clare, though the title of earl would not be officially granted until 1199 during the second creation of the .
In 1216, he was appointed protector for the nine-year-old Henry III, and regent of the kingdom.
Before him, his father's family held a hereditary title of Marshal to the king, which by his father's time had become recognized as a chief or master Marshalcy, involving management over other Marshals and functionaries.
William became known as 'the Marshal', although by his time much of the function was delegated to more specialized representatives (as happened with other functions in the King's household).
Because he was an Earl, and also known as the Marshal, the term "Earl Marshal" was commonly used and this later became an established hereditary title in the English Peerage.
All Kings of England, Great Britain and the United Kingdom since James VI
and I have been cognatic descendants of William Marshal through his great-great-grandson Robert the Bruce.
John Hastings, 3rd Earl of Pembroke
John Hastings, 3rd Earl of Pembroke( October 137230 December 1389) was the son of John Hastings, 2nd Earl of Pembroke and Anne Manny, 2nd Baroness Manny.
He was also Baron Abergavenny.
John Devereux of Bodenham and Decies
John Devereux of Bodenham and Decies was an Anglo- Norman nobleman living during the reigns of King John and Henry III of England.
The Devereux were a prominent knightly family along the Welsh Marches during the thirteenth century, and John Devereux was a key member of the retinue of Richard Marshal, 3rd Earl of Pembroke, and companion of Walter III de Clifford, Baron of Clifford.
Philip Herbert, 7th Earl of Pembroke
Philip Herbert, 7th Earl of Pembroke, 4th Earl of Montgomery KB( 1652/53 – 29 August 1683) was an English nobleman and politician who succeeded to the titles and estates of two earldoms on 8 July 1674 on the death of his brother William Herbert, 6th Earl of Pembroke.
He was a homicidal maniac and convicted murderer, who has been called" the infamous Earl of Pembroke."
Although the murder of the magistrate Sir Edmund Berry Godfrey, which sparked the Popish Plot, has never been solved, a strong body of evidence points to Pembroke as the killer.
Sidney Herbert, 16th Earl of Pembroke
Sidney Herbert, 16th Earl of Pembroke, 13th Earl of Montgomery( 9 January 1906 – 16 March 1969) was a British peer.
Henry Herbert, 9th Earl of Pembroke
Lt.- Gen. Henry Herbert, 9th Earl of Pembroke, 6th Earl of Montgomery( 29 January 16939 January 1749) was an English peer and courtier.
He was the heir and eldest son of Thomas Herbert, 8th Earl of Pembroke( c. 1656 – 1733) and his first wife Margaret Sawyer.
He was styled Lord Herbert from birth until he inherited his father's earldoms of Pembroke and Montgomery in 1733.
Marie de St Pol
Marie de St Pol, Countess of Pembroke( c.1303–1377) was the wife of Aymer de Valence, 2nd Earl of Pembroke( c.1275-1324), and is best known as the foundress of Pembroke College, Cambridge.
Richard Marshal, 3rd Earl of Pembroke
Richard Marshal, 3rd Earl of Pembroke (119116 April 1234), was the son of William Marshal, 1st Earl of Pembroke and brother of William Marshal, 2nd Earl of Pembroke, whom he succeeded to the Earldom of Pembroke and Lord Marshal of England upon his brother's death on 6 April 1231.
Anne Hastings, Countess of Pembroke
Anne Hastings, Countess of Pembroke and 2nd Baroness Manny( 24 July 1355 – 3 April 1384) was the daughter of Walter Manny, 1st Baron Manny and Margaret, Duchess of Norfolk.
In July 1368, she married John Hastings, 2nd Earl of Pembroke.
They had one son, John Hastings, 3rd Earl of Pembroke.
Her husband and father both died in 1375, and she became" suo jure" Baroness Manny( her one brother having died in his youth).
Shortly before her death in 1384, she was invested as a Lady of the Garter.
William Herbert, 18th Earl of Pembroke
William Alexander Sidney Herbert, 18th Earl of Pembroke, 15th Earl of Montgomery( born 18 May 1978) is an English peer.
He became earl in 2003 following the death of his father, Henry Herbert, 17th Earl of Pembroke.

Question: What is the date of birth of Richard Marshal, 3Rd Earl Of Pembroke's father?
Answer: 1146