Lord Brecknock of Bramber, 11th Lord of Abergavenny, 5th Baron de Braiose William de Braose, III

1153 - 1211  (57 years)

• Name	William de Braose  [1, 2, 3, 4]
  Title	Lord Brecknock of Bramber, 11th Lord of Abergavenny, 5th Baron de Braiose
  Suffix	III
  Birth	24 Dec 1153	Bramber, Sussex, England   [1, 2, 4]
  Gender	Male
  Military - Old World	1175
  	William de Braose carried out the Abergavenny Massacre, luring three Welsh princes to their deaths. After having invited the Welsh leaders to a Christmas feast at Abergavenny Castle under the pretense of peace he had them murdered by his men
  Military - Old World	1199
  	He fought beside Richard the Lionhearted at Chalus where the King died
  Occupation	Sheriff of Herefordshire
  Death	9 Aug 1211	Corbeil, Essonne, Île-de-France, France   [1, 2, 3, 4]
  	William and family were captured and imprisoned by King John to make him pay the money he owed him. William fled to France leaving them behind to die.
  Burial	Paris, Île-de-France, France   [4]
  	Abbey de Saint Victor
  		Church - Abbaye de Saint Victor Abbaye de Saint Victor -- Founded in 1108 by Guillaume de Champeaux and was destroyed during the Revolution. It was roughly located where Place Jussieu and the Rue St. Victor are today. + http://www.findagrave.com/cgi-bin/fg.cgi?page=pv&GRid=10142337&PIpi=98903460
  Person ID	I20021	A Tree Called Smith
  Last Modified	21 Jul 2025

  
  

  Father	3rd Lord of Bramber William de Braose, II,   b. 1135, Brecon, Breconshire, Wales d. Mar 1179, Weobley, Herefordshire, England (Age 44 years)
  Relationship	natural
  Mother	Bertha de Pitres,   b. 1130, Gloucester, Gloucestershire, England d. 1204, Bramber, Sussex, England (Age 74 years)
  Relationship	natural
  Marriage	1150	Herefordshire, England
  Family ID	F4469	Group Sheet  |  Family Chart

  
  

  Family	Maud de St Valéry,   b. 1154, Beckley, Oxfordshire, England d. 9 Aug 1211, Corfe Castle, Dorset, England (Age 57 years)
  Marriage	1172	Bramber, Sussex, England
  	Bramber Castle
  Children	1. 5th Lord of Bramber William de Braose, IV,   b. 1175, Bramber, Sussex, England d. 9 Aug 1211, Corfe Castle, Dorset, England (Age 36 years)  [Father: natural]  [Mother: natural]
  Family ID	F7646	Group Sheet  |  Family Chart
  Last Modified	21 Jul 2025

  
  

• Event Map

  Birth - 24 Dec 1153 - Bramber, Sussex, England Marriage - 1172 - Bramber, Sussex, England Death - 9 Aug 1211 - Corbeil, Essonne, Île-de-France, France Burial - - Paris, Île-de-France, France  = Link to Google Earth

  
  

• Arms Icons & Insignia

  Arms-BRAOSE Braose Coat of Arms

  
  

  Biographies and Histories

  History-deBRAOSE William III and IV William de Braose III, 4th Lord of Bramber, and William de Braose IV, and how their deaths influenced the Magna Carta

  
  

  Places

  Church - Abbaye de Saint Victor Abbaye de Saint Victor -- Founded in 1108 by Guillaume de Champeaux and was destroyed during the Revolution. It was roughly located where Place Jussieu and the Rue St. Victor are today. + http://www.findagrave.com/cgi-bin/fg.cgi?page=pv&GRid=10142337&PIpi=98903460

  
  

• Sources

  [S984] Heritage Consulting, Millennium File, (Name: Ancestry.com Operations Inc; Location: Provo, UT ; Date: 2003;). [S202] Ancestry.com, Web: Netherlands, GenealogieOnline Trees Index, 1000-Current, (Name: Ancestry.com Operations, Inc.; Location: Provo, UT ; Date: 2014;). [S508] Ancestry.com, Dictionary of National Biography, Volumes 1-20, 22, (Name: Ancestry.com Operations, Inc.; Location: Provo, UT ; Date: 2010;). Dictionary of National Biography, Volumes 1-20, 22 [S10709] FindAGrave Old World (Famous), William de Braose III 1153-1211 - Massacre of Abergavenny. 4th Lord of Bramber, son of William II. de Braose and Bertha de Pîtres. He is responsible for the Massacre of Abergavenny in 1175 where three welsh princes, their wives, children and all the men that had accompanied them to Abergavenny were murdered. In 1174 he married Mathilde de St. Valerie who later entered Welsh folk literature as Moll Walbee. They had 16 children. Between 1192 and 1199 he was Sheriff of Herefordshire. He fought beside Richard I. at Chalus where the King died. In the beginning of King John's reign he was greatly favored got Glamorgan Castle and was given lordships over Limerick and Gower. In 1203 he accompanied John to the Normandy where he captured John's nephew Arthur. In 1207 it became clear that he was fallen out of favor with the king. The reasons for that are obscure. It might have something to do with money he owed the King or Mathilde saying that that John was responsible for Arthur's death. John seized the de Braose domains. The family fled to Ireland in 1208 and returned in the following year. His family was captured and imprisoned by John to make him pay the money he owed him. William fled to France leaving them behind. His oldest son and his wife starved to death at Corfe Castle. He died in Corbeil and was buried the following day. The memorial service was held by Stephen Langton, Archbishop of Canterbury who lived in exile, too. https://www.findagrave.com/memorial/10142337/william_iii-de_braose