'Fiennes01'
Index links to: Lead / Letter
Families covered: Fiennes of Fiennes, Plaunche of Haverham

Eustace de Fiennes (a 1066)
The ancestry shown for Eustace is as suggested by 'Tudor'. However, it should be noted that BP1934 (Saye and Sele) reports that the Sir William Fiennes who married Joan de Saye (see below) was "10th in descent from John Fiennes, Baron of Fiennes, kinsman and companion of William the Conqueror".
m. Adela de Furnes (dau of Erard de Furnes or Selnesse)
1. Conan de Fiennes
  m. Alice de Bournonville (dau of Louis de Bournonville)
A. Eustace de Fiennes
  m. Anne de Dreux
  i. Enguerrand (Ingelgram) de Fiennes (b c1128, d 1189)
  m. Sibille de Tingry (dau of Pharamus de Tingrie of Boulogne)
  The above male line (and Sibille) is supported by TCP (Saye and Sele), reporting Dugdale's 'Baronage'.
  a. William, 1st Baron de Fiennes (b 1160, d 1240-1)
  m. Agnes de Dammartin (dau of Aubrey or Alberic II, Count of Dammartin)
  (1) Sir Ingelgram (Enguerrand) de Fiennes
  m1. Maud Hampden
  m2. Isabel de Conde (dau of Jacques, Sn de Conde)
'Tudor' shows both these marriages with all the children by Maud. 'Mathematical' shows only the marriage to Isabel and so shows all the children by her. TCP (Hereford) shows Humphrey de Bohun's wife's mother as a daughter of Jacques, Seigneur of Conde, etc..
  (A) William, 2nd Baron de Fiennes (b c1245, d 1302, 2nd son)
  m. Blanche de Brienne (probably dau of Jean de Brienne of Acre)
  (i) Margaret de Fiennes (d 07.02.1333/4)
Y
  m. (c1285) Sir Edmund de Mortimer, 1st Lord of Wigmore (d Buelt 17.07.1303/4)
Y
  (ii) Joan de Fiennes (b c1273, d before 26.10.1309)
HJY
  This connection may not be secure.
  m. John Wake, 1st Lord Wake (d 1304)
HJY
  (iii) Jean de Fiennes of Tigny (a 1333)
  m. Isabelle of Flanders (d 1323, dau of Guy de Dampierre, Count of Flanders)
(a) Jeanne de Fiennes
GSY
  m. (c1314) Jean de Chatillon, Count of St. Pol (d 1334)
GSY
  (B) Maud de Fiennes
  m. Humphrey de Bohun, 3rd Earl of Hereford, Earl of Essex, Constable of England (d 1297)
  (C) Sir Giles de Fiennes (b c1250, d 1293)
  m. Sybilla Fillol
  (i) Sir John Fiennes (b c1280, d 1331)
  m. Jean Jordan
  (a) Sir John Fiennes (d 05.04.1351)
  m. Maud de Monceaux
  ((1)) Sir William Fiennes (b 02.02.1331/2, d 30.11.1359, 2nd son)
  m. (12.11.1351) Joan de Saye (dau of Geoffrey de Saye, 2nd Lord)
  ((2))+ other issue - John (d c1327), Robert, John
  (ii)+ other issue - Robert, Eleanor
  (D)+ other issue - Reginald, Robert of Heuchin, Ingelgram (Enguerrand)
(2) William de Fiennes = William de la Plaunche
  (A) William de la Plaunche
  (i) James de la Plaunche of Haversham, Buckinghamshire
  m. Maud de Haversham (dau of Nicholas de Haversham of Haversham)
  (a) William de la Plaunche of Haversham
  m. Elizabeth Hillary (dau of Sir Roger Hillary of Bescot)
  ((1)) Elizabeth de la Plaunche (b c1347, dsps after 01.09.1423)
 

m1. (before 03.07.1356) Sir John de Bermingham (dsp before 1393)

m2. Robert Grey, 4th Lord of Rotherfield (d 01.1387/8)
  m3. (before 24.10.1388) John de Clinton, 3rd Lord (d 09.1398)
  m4. Sir John Russell
  ((2)) Katharine de la Plaunche
  Thanks to a site visitor (OWC, 28.01.08) for reporting that 'A History of the County of Buckinghamshire (Vol 3, 1925) identifies her husbands as ...
  m1. ??
  m2. William de Bermingham of Hoggeston
  m3. Sir Bernard Brocas
  (b) Joan de la Plaunche
  m. John de Pabenham
  (ii) John de la Plaunche
  (iii) Alice de la Plaunche
  m. John de Montfort, 1st Lord (d before 11.05.1296)
  (3) Maud de Fiennes
GS
  m. Bauduin III, Count de Guisnes (d 1244)
GS
  (4) Agnes de Fiennes
  m. Bartholomew de Hampden

Main sources: various web sites including 'Tudor'
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