Isabel of Beaumont
Isabel de Beaumont, Duchess of Lancaster, of the House of Brienne( – 1361) was an English noblewoman, being the youngest daughter and child of Henry de Beaumont, Earl of Buchan and Alice Comyn.
Waleran de Beaumont, 4th Earl of Warwick
Waleran de Beaumont, 4th Earl of Warwick (1153 – 12 December 1204) was the younger son of Roger de Beaumont, 2nd Earl of Warwick and Gundred de Warenne, daughter of William de Warenne, 2nd Earl of Surrey and Elizabeth de Vermandois.
He was also known as Walerian de Newburg.
After the death of his brother, William de Beaumont, 3rd Earl of Warwick, an impostor arose, claiming to be the deceased Earl; he gave Waleran a great deal of trouble in maintaining his claim.
He does not appear to have been a great soldier, for he paid scutage money to escape military service in Wales.
His position in the Court is attested by his bearing the right hand Sword of State at the Coronation of John, King of England, 27 May 1199.
He liberally supported the hospital of St Michael's Hospital, Warwick and gave to the nuns of Pinley land at Claverdon, and land at Brailes to the nuns at Wroxall, Warwickshire.
Waleran de Beaumont, 1st Earl of Worcester
Waleran de Beaumont, Count of Meulan, 1st Earl of Worcester( 1104 – 9 April 1166, Preaux), was the son of Robert de Beaumont, 1st Earl of Leicester and Elizabeth de Vermandois, and the twin brother of Robert de Beaumont, 2nd Earl of Leicester.
He is not referred to by any surname in a contemporary document other than' Waleran son of Count Robert'.
Henry Percy, 1st Earl of Northumberland
Henry Percy, 1st Earl of Northumberland, 4th Baron Percy, titular King of Mann, KG, Lord Marshal( 10 November 134120 February 1408) was the son of Henry de Percy, 3rd Baron Percy, and a descendant of Henry III of England.
His mother was Mary of Lancaster, daughter of Henry, 3rd Earl of Lancaster, son of Edmund, Earl of Leicester and Lancaster, who was the son of Henry III.
Margaret de Beaumont, 7th Countess of Warwick
Margaret de Beaumont, 7th Countess of Warwick or Margaret de Neubourg or Margery de Newburgh( died 3 June 1253) was the daughter of Henry de Beaumont, 5th Earl of Warwick and Margaret D'Oyly.
She was the sister and heiress of Thomas de Beaumont, 6th Earl of Warwick and became the 7th Countess of Warwick in her own right.
She married firstly John Marshal( died October 1242) and, secondly, John de Plessis.
The latter was a great favourite of King Henry III of England who, in 1247, created him the 7th Earl of Warwick and subsequently Count of Warwick.
He died on 20 February 1263.
There was no issue by either of these marriages and so, at Margaret's death, the estates passed to her cousin, William Mauduit, who became the 8th Earl.
Henry de Beaumont, 5th Earl of Warwick
Henry de Beaumont, 5th Earl of Warwick (c. 1192 – 10 October 1229), Earl of Warwick, and by marriage Lord of Hocknorton (Hook Norton) and Hedenton (Headington) in Oxfordshire, was the son of Waleran de Beaumont, 4th Earl of Warwick and Margaret.
He was also known as Henry de Newburgh.
Thomas de Beaumont, 6th Earl of Warwick
Thomas de Beaumont, 6th Earl of Warwick( 1208 – 26 June 1242), Earl of Warwick, Baron of Hocknorton( Hook Norton) and Hedenton, was the son of Henry de Beaumont, 5th Earl of Warwick and Margaret D' Oili.
He was also known as Thomas de Henry.
Although he had attained his majority at the death of his father, he did not get full possession of the earldom until four years later, when he was girt with the Sword of Knighthood; this took place at Gloucester where the King was spending Whitsuntide.
He inherited his uncle's( Henry D' Oili) Oxfordshire estate and owned the Manor of Bewdley, Worcester and rendered service for it, of a fully equipped archer for twenty days, as often as there was war against the Welsh.
In 1241, he paid one hundred and eighty marks scutage in order that he might be excused attendance on Henry III of England in the expedition to Gascony.
This was in excess of the sum due from him; the following year he paid a further one hundred and twenty marks.
At the coronation of Eleanor of Provence, the Queen Consort of Henry III, on 26 June, 1236 he bore the third Sword of State, claiming that it was his hereditary right to do so.
He married Ela Longespee, daughter of William Longespée, 3rd Earl of Salisbury, natural son to Henry II.
Amongst Ela's benefactions were grants to the monks at Reading, Berkshire, the Canons of Osney, Oxfordshire, St Sepulchre's, Warwick, the grey friars in London, and the Nuns of Godstow, Oxford.
In 1295, she gave land to the University of Oxford, from which a certain amount of the income was to be paid to the fellows of Merton College that they might perform masses for her soul.
Roger de Beaumont, 2nd Earl of Warwick
Roger de Beaumont, 2nd Earl of Warwick( c. 1102 – 12 June 1153) was the elder son of Henry de Beaumont, 1st Earl of Warwick and Margaret( d. after 1156), daughter of Geoffroy, Count of Perche and Beatrix of Montdidier.
He was also known as Roger de Newburgh.
The borough of Warwick remembers him as the founder of the Hospital of S. Michael for lepers which he endowed with the tithes of Wedgnock, and other property; he also endowed the House of the Templars beyond the bridge.
He also built the Chapel of St James the Great in Warwick which is now part of the Lord Leycester Hospital
In the reign of King Stephen he founded a priory dedicated to S. Cenydd at Llangennith, Co. Glamorgan and he attached it as a cell to the Abbey of S. Taurinus at Evreux in Normandy.
William de Beaumont, 3rd Earl of Warwick
William de Beaumont, 3rd Earl of Warwick( before 1140 – 15 November 1184) was an English nobleman.
He was married to Matilda de Percy( †c. 1204), daughter of William de Percy( † 1175) and his first wife Alice of Tonbridge( † 1148).
He inherited the earldom from Roger de Beaumont, 2nd Earl of Warwick.
On his father's death in 1153, William may have been a minor.
William died, probably on Crusade, in 1184, and was succeeded by his brother Waleran de Beaumont, 4th Earl of Warwick.
Henry de Beaumont, 1st Earl of Warwick
Henry de Beaumont, 1st Earl of Warwick or Henry de Newburgh( died 20 June 1119) was a Norman nobleman who rose to great prominence in the Kingdom of England.

Question: Who is Henry De Beaumont, 5Th Earl Of Warwick's paternal grandmother?
Answer: Gundred de Warenne