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Birth:          1225 Cistercian Abbey, Valence, Charente, France
Death:          18 May 1296 

Notes
https://en.wikipedia.org/wiki/William_de_Valence,_1st_Earl_of_Pembroke
William de Valence (died 18 May 1296), born Guillaume de Lusignan, was a French 
nobleman and knight who became important in English politics due to his relationship 
to Henry III. He was heavily involved in the Second Barons' War, supporting the King 
and Prince Edward against the rebels led by Simon de Montfort. He took the name de 
Valence ("of Valence").

He was the fourth son of Isabella of Angoulême, widow of king John of England, and 
her second husband, Hugh X of Lusignan, Count of La Marche, and was thus a half-
brother to Henry III of England, and uncle to Edward I. William was born in the 
Cistercian abbey in Valence (fr), Couhé-Vérac, Vienne, Poitou-Charentes, near 
Lusignan,[1] sometime in the late 1220s (his elder sister Alice was born in 1224).
Move to England[edit]

The French conquest of Poitou in 1246 created great difficulties for William's family, 
and so he and his brothers, Guy de Lusignan and Aymer, accepted Henry III's 
invitation to come to England in 1247. The king found important positions for all of 
them; William was soon married to a great heiress, Joan de Munchensi or Munchensy 
(c. 1230 – after 20 September 1307), the only surviving child of Warin de Munchensi, 
lord of Swanscombe, and his first wife Joan Marshal, who was one of the five 
daughters of William Marshal, 1st Earl of Pembroke and Isabel de Clare, 4th Countess 
of Pembroke suo jure. As an eventual co-heiress of the Marshal estates, Joan de 
Munchensi's portion included the castle and lordship of Pembroke and the lordship 
erected earldom of Wexford in Ireland. The custody of Joan's property was entrusted 
to her husband, who apparently assumed the lordships of Pembroke and Wexford 
between 1250 and 1260.

The Second Barons' War[edit]

This favouritism to royal relatives was unpopular with many of the English nobility, a 
discontent which would culminate in the Second Barons' War. It did not take long for 
William to make enemies in England. From his new lands in South Wales, he tried to 
regain the palatine rights which had been attached to the Earldom of Pembroke, but 
his energies were not confined to this. The King heaped lands and honours upon him, 
and he was soon thoroughly hated as one of the most prominent of the rapacious 
foreigners. Moreover, some trouble in Wales led to a quarrel between him and Simon 
de Montfort, who was to become the figurehead for the rebels. He refused to comply 
with the provisions imposed on the King at Oxford in 1258, and took refuge in 
Wolvesey Castle at Winchester, where he was besieged and compelled to surrender 
and leave the country.

However, in 1259 William and de Montfort were formally reconciled in Paris, and in 
1261 Valence was again in England and once more enjoying the royal favour. He 
fought for Henry at the disastrous Battle of Lewes, and after the defeat again fled to 
France, while de Montfort ruled England. However, by 1265 he was back, landing in 
Pembrokeshire, and taking part in the Siege of Gloucester and the final royalist victory 
at Evesham. After the battle he was restored to his estates and accompanied Prince 
Edward, afterwards Edward I, to Palestine.

Welsh wars and death[edit]

From his base in Pembrokeshire he was a mainstay of the English campaigns against 
Llywelyn ap Gruffudd and later Dafydd ap Gruffudd; in the war of 1282–3 that led to 
the conquest of Wales he negotiated the surrender of one of Dafydd's last remaining 
castles, Castell-y-Bere, with its custodian, Cynfrig ap Madog. He also went several 
times to France on public business and he was one of Edward's representatives in the 
famous suit over the succession to the crown of Scotland in 1291 and 1292.

William de Valence died at Bayonne on the 13 June 1296; his body is buried at 
Westminster Abbey.

Descendants[edit]

William and Joan de Munchensi (described above) had the following children:
Isabel de Valence (died 5 October 1305), married before 1280 John Hastings, 1st 
Baron Hastings (6 May 1262 – 10 February 1313). Their grandson Lawrence later 
became earl of Pembroke. They had: William Hastings (1282–1311)
John Hastings, 2nd Baron Hastings (29 September 1286 – 20 January 1325), married to 
Juliane de Leybourne (died 1367)
Sir Hugh Hastings of Sutton (died 1347)
Elizabeth Hastings (1294 - 6 March 1353), married Roger Grey, 1st Baron Grey de 
Ruthyn.

Joan de Valence, married to John Comyn (the "Red Comyn"), Lord of Badenoch (died 
10 February 1306, murdered), and had John Comyn (k.1314 at Bannockburn), married 
to Margaret Wake, 3rd Baroness Wake of Liddell
Joan Comyn (c.1296-1326), married to David II Strathbogie, Earl of Atholl
Elizabeth Comyn (1 November 1299 – 20 November 1372), married to Richard Talbot, 
Lord Talbot

John de Valence (died January 1277)
William de Valence (died 16 June 1282, in the Battle of Llandeilo Fawr in Wales), 
created Seigneur de Montignac and Bellac
Aymer de Valence, 2nd Earl of Pembroke and Wexford in 1296 (c. 1270 – 23 June 
1324), married firstly to Beatrice de Clermont and married secondly to Marie de 
Chatillon
Margaret de Valence, died young. Buried at Westminster Abbey.
Agnes de Valence (born c. 1250, date of death unknown), married (1) Maurice 
FitzGerald, Baron of Offaly, (2) Hugh de Balliol, son of John de Balliol, and brother of 
John Balliol, King of Scotland, and (3) John of Avesnes, Lord of Beaumont son of 
Baldwin of Avesnes. Agnes had children from her first and third marriage:[2] Gerald 
FitzMaurice, Baron of Offaly
John of Avesnes
Baldwin of Avesnes, Lord of Beaumont.
Felicite of Avesnes
Jeanne of Avesnes, Abbess of Flines.


Parents
DE LUSIGNAN Hugh (Hugues) X (ABT 1195 - ABT 5 Jun 1249)
DE TAILLEFER OF ANGOULEME Isabella (1188 - 31 May 1246)

Siblings
DE LUSIGNAN Hugh XI (1221 - 6 Apr 1250)
LUSIGNAN (DE BRIEN) Alice (ABT 1224 - 9 Feb 1291)
DE LUSIGNAN [CHG TO DE VALENCE] Guillaume (1225 - 18 May 1296)

Marriage To DE MUNCHENSY Joan (ABT 1232 - AFT 20 Sep 1307)
    m.  

Notes

Parents
DE MUNCHENSY Warin (ABT 1192 - 20 Jul 1255)
MARSHALL Joane (ABT 1202 - ABT 1234)

Children by DE MUNCHENSY Joan ABT 1232 - AFT 20 Sep 1307
DE VALENCE Isabel (1270 - 3 Oct 1305)
DE VALENCE Joan (Johanna) (1273 - )

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