The Peerage lists a Peter de Preaux and a Pierre de Preaux. Are they related? If so, are they brothers? Cousins? Or the same person who married two different women? Pierre de Preaux married Mary de Vernon, daughter of William de Revières, 5th Earl of Devon and Mabile de Beaumont. and Peter de Preaux married Isabel d'Estouteville, daughter of Henry d'Estouteville and Mahant de Warenne.

Brother, not father, of William de Préaux. Third(?) son of Osbert de Préaux.no mother is listed .Except on Wikipedia. See sources.

Peter de Preaux or Pierre de Préaux (died 1212) was a Norman knight in the service of the Angevin kings of England. Osbert, Peter's father, was a minor Norman baron in the Roumois (the neighborhood of Rouen, the capital of Normandy). He held the tower and ville of Preaux as well as land at Darnétal. Osbert also owned a scattering of manors in England. Peter, as the second son of the sire de Preaux, had few prospects for a landed estate. He, along with his brothers John, William, and Enguerrand were part of the royal household from a very early age. Peter would serve in succession, Henry II, Richard I, and John of England. Peter and William were known throughout the tournament circuit of the day as fierce warriors and competent knights. Sometime prior to 1189 CE, Osbert had died. John, the eldest son, succeeded him to the family barony.

Peter and William accompanied King Richard on crusade in 1190. Peter was assigned the dignity of royal standard-bearer over the hereditary standard-bearer of England, Robert Trussebut. Peter and William were known to be with the King at Vezelay, Marseille, Sicily, the conquest of Cyprus, the Siege of Acre, the Battle of Arsuf, the march to Jaffa, the advance on Jerusalem, Darum, and last but not least, the Battle of Jaffa. https://en.wikipedia.org/wiki/Peter_de_Preaux

One conclusion that can be drawn from the closeness of Peter and William is that they were very close in age, perhaps a year or so apart, possibly even twins.

Peter married in 1201 Mary de Vernon, daughter of William de Vernon, 5th Earl of Devon and the Isle of Wight. (ibid.)

Seems to have inherited Gidleigh as "next of surviving kin" sometime between c. 1200-1210, probably from a cousin who died heirless.

=========================================================================================================

Served under Henry II, Richard I and John.

Agreed treaty surrendering Normandy to Philippe-Auguste

Friend of King John

1196 Witnessed agreement at Le Vaudreuil between Engeler de Bohun and Richard I

1202 Received grant of Channel Islands from King John: Peter was Warden and had to supply 3 knights in return

Jan 1202 when Queen Isabella was cut off from King John and in danger of capture by Norman rebels, Peter brought her safely to Le Mans

May 1204 his men in Channel Islands on guard against French invasion

1204 One of John's commanders in Normandy: commanded at Rouen

1204 Had grant of Jersey, Guernsey, Alderney

1/6/1204 Concluded temporary armistice with Philippe Auguste: barons and citizens would surender Rouen if no help came within 30 days. Rouen surrendered on 24 June with rumours that Peter de Preaux had been bribed

1207 or earlier: joined King John in England

Died between 1207 and 1212

• ___________________________
• 'Pierre (Peter) de Preaux (Prouz)1
• M
• ' Pierre (Peter) de Preaux (Prouz) was born at of Chagford & Eastervale, Devonshire, England. He married Mary de Vernon, daughter of William de Vernon de Redvers, 5th Earl Devon and Maud (Mabel) de Beaumont, in 1200.
• 'Family Mary de Vernon d. a 1242
• Child
  • William Prouz+ [named after his brother William]
• Citations
• 1.[S94] Unknown author, Pedigrees of Some of the Emperor Charlemagne's Descendants.
• From: http://our-royal-titled-noble-and-commoner-ancestors.com/p830.htm#i...
• _______________

  ---

  
  

d. between 1207 and 1212) who was one of King John's chief commanders in his wars with Philippe-Auguste of France, and was warden of the Channel Islands. In 1204 he defended Rouen against the French. He negotiated an armistice under which Rouen would be surrendered if no relief came within 30 days - and none did. After the surrender, there were rumours that he had been bribed, but he seems to have retained King John's favour. He was a signatory to the treaty finally ceding Normandy to the French, and joined King John in England.

Sources

• https://fmg.ac/Projects/MedLands/CONTENTS.htm
• http://racineshistoire.free.fr/LGN/PDF/Anjou-Gatinais.pdf
• http://www.thepeerage.com/p19080.htm#i190794
• [S37] Mosley, Charles, editor. Burke's Peerage, Baronetage & Knightage, 107th edition, 3 volumes. Wilmington, Delaware, U.S.A.: Burke's Peerage (Genealogical Books) Ltd, 2003. (Pierre de Preaux)
• http://www.thepeerage.com/p24828.htm#i248279
• https://buist-keatch.org/buist/goring/5017.html (Pierre de Preaux)
• Richardson, Douglas. Plantagenet Ancestry. Baltimore, Maryland, U.S.A.: Genealogical Publishing Company, 2004.(Peter de Preaix)