'Blois1'Index links to: Lead / Letter
Families covered: Counts of Aumale (Albemarle), Counts of Blois and Chartres, Counts of Troyes, Lords of Holderness

Gerlon, Count of Blois (d 928)
According to 'Royal Genealogies', the founder of this family was Gerlon who came to Normandy with Rollo. The first couple of generations are not fully secure which has led to some confusion as to the numbering of the different Counts Thibaut (Theobald). We think it highly unlikely that Gerlon had any descent from Charlemagne, something mentioned here.
1. Thibaut = Tetbald, Vicomte de Tours, later Count of Blois (d c942)
  m1. ??
  A. Thibaut I (Theobald) 'le Tricheur' ('the Trickster'), Count of Blois et Chartres & Tours (b 910, d 975)
  m. Luitgarde de Vermandois (b c914, d 09.02.978, dau of Herbert II, Count of Vermandois et Troyes)
i. Thibaut de Blois (d before 962)
  ii. Hugues de Blois, Archbishop of Bourges (d 985)
  iii. Eudes I, Count de Blois, Chartres, etc (b 950, d 995)
  m. Bertha of Burgundy (d after 1016, dau of Konrad 'the peaceful', King of Burgundy)
  a. Thibaut II, Count de Blois (d 11.07.1004, priest)
b. Eudes II, Count de Blois, Chartres, etc (b 983, d 15.11.1037)
  m1. (1003/4) Matilda of Normandy (d c1005, dau of Richard I, Count of Rouen, Duke of Normandy)
  m2. Ermengarde (d after 1042, dau of Robert, Count of Auvergne)
  (1) Thibaut III, Count de Blois, Chartres, etc (b 1012, d 29/30.09.1089)
  m1. (div 1048) Gersende (dau of Herbert, Count de Maine)
  m2. Gundrada
  (A) Etienne (Stephen Henry), Count de Blois, Chartres, etc (b 1046, d Ramleh 1102)
  m. (1081) Adela of England (b 1062, d 1137/8, dau of William I 'the Conqueror', Duke of Normandy, King of England)
  (i) Guillaume, Count of Chartres, later Sire de Sully had issue
  m. Agnes (dau of Gilles de Sully)
  Guillaume was disinherited by his father. His descendants were Sires de Sully.
  (ii) Thibaut IV, Count de Blois, Troyes, etc (b 02.04.1090, d 1152)
  m. (1123) Mathilde of Carinthia (d 1160, dau of Engelbert II, Count of Sponheim, Duke of Carinthia)
  (a) Henry I de Blois 'le Liberal', Count de Champagne et de Brie (b 1126, d 17.03.1181) GHJSWY
  m. (1164) Marie de France (b 1145, d 11.03.1198, dau of Louis VII, King of France) GHJSWY
(b) Thibaut V 'le Bon', Count de Blois et Chartres (b c1130, d Acre 1191)
  m1. Sibylle de Chateaurenard
  m2. (1164) Adela / Alix of France (b 1151, d after 1195, dau of Louis VII, King of France)
  ((1)) Louis, Count de Blois (d 15.04.1205, 2nd son)
  m. (1184) Catherine de Clermont (d after 1208)
  ((A)) Thibaut VI, Count de Blois et Clermont (d 1218)
  m1. Clemence des Roches
  m2. (?) Matilda d'Alencon
  ((2)) Marguerite de Blois, Countess de Blois et de Chateaudun (b c1170,d 12.07.1230) GHSY
  m1. (c1183) Hugues III d'Oisy, Vcte de Cambrai (d 1189/90)
  m2. (c1190) Otto von Hohenstaufen, Count Palatine of Burgundy (d 1200)
  m3. (after 1200) Gautier II d'Avesnes, Count de Blois, Conde, Guise, etc. GHSY
  ((3)) Isabelle de Blois, Countess de Chartres et de Romorantin (d 25.11.1248)
  m1. Sulpice d'Amboise
  m2. (before 1224) Jean de Montmirail, Vcte de Cambrai (d c1244)
  ((4))+ other issue - 3 sons (d young - Thibaut, Henri, Philippe), Adelaide (a 1190, Abbess of Fontevrault)
(c) Etienne de Blois, Count de Sancerre (d Acre 1191) had issue
  m. (1153) Alix / Matilda de Donzy (dau of Godefroy, Sn de Donzy)
  (d) Marie de Blois, later Abbess of Fontevrault (b 1128, d c1190) GHJSWY
  m. (1145) Eudes II, Duke of Bourgogne (b 1118, d 1162) GHJSWY
  (e) Isabelle de Blois (b 1130)
  m1. (1139/40) Roger, Duke of Apulia (d 1148)
  m2. (1150/5) Guillaume Goet IV de Montmirail, Baron de Perche-Gouet (d c1170)
  (f) Mahaut de Blois
  m. Rotrou III, Count du Perche (d 1191)
  (g) Agnes de Blois, Dame de Ligny (b 1138, d 07.08.1207) GHJSWY
  m. (1155) Reinald II, Count de Bar (d 1170) GHJSWY
(h) Adela / Alix de Blois (b 1140, d 04.06.1206) GHJSWY
  m. (13/8.10.1160) Louis VII, King of France (b 1120, d 18.09.1180) GHJSWY
  (i)+ other issue - Guillaume (d 07.09.1202, Cardinal, Archbishop of Sens, Bishop of Chartres), Hugues (a 1155, Abbot of Citeaux), Marguerite (nun)
  (iii) Etienne de Blois, Count of Boulogne = Stephen, King of England (b 1092-7, d 25.10.1154)
  Stephen usurped the throne of England in place of his cousin Matilda. However, it was Matilda's eldest son Henry (II) who succeeded.
  m. (1125) Matilda, Countess of Bologne (d 30.05.1151, dau of Eustache III, Count of Bologne et Lens)
  (a) Eustache IV de Boulogne (b 1127, dvpsp 10.08.1154, 2nd son)
  m. (02.1140) Constance of France (d 16.08.1176, dau of Louis VI, King of France)
  (b) Guillaume (William) de Blois, Count de Boulogne et de Mortain, Earl of Warenne and Surrey, Lord of Pevensey and Norwich (d 11.10.1159)
m. (before 06.11.1153) Isabelle de Warenne (b 1137, d 12/3.07.1199, dau of William de Warrenne, Earl of Warrenne, 3rd Earl of Surrey)
  (c) Marie de Blois, Countess de Boulogne, Abbess of Romsey (b c1131, d 25.07.1180) GHJWY
  m. (before 1160, div 1169/70) Matthias of Lorraine, Count de Boulogne (d 25.12.1173) GHJWY
  (d)+ other issue - Baudoin (dvp c1135), Mahaut (d c1135)
  (iv) Henri de Blois, Bishop of Winchester (d 01.07.1171)
  (v) Eudes de Blois (d after 1107)
  (vi) Mahaut (Maud) de Blois
  m. (1115) Richard d'Avranches, 2nd Earl of Chester (b c1094, d 25.11.1119-20)
  (vii) Lithuaise de Blois
  m. (c1112, div 1113) Milon de Montlhery, Vcte de Troyes (d 1118)
  (viii) Emma de Blois --
  m. Herbert, Lord Chamberlain (temp King William Rufus 1087-1100) --
(B) Eudes IV, Count of Troyes (d 1090/7)
  (C) Philippe de Blois, Bishop of Chalons-sur-Marne (d 1100)
  (D) Hugues I , Count of Troyes (d 14.06.1126)
  m1. (1093/5, div 1104) Constance of France (d 1124/6)
  m2. (c1110) Isabelle de Bourgogne (d after 1125)
  m3. (before 1061) Adela / Alix de Crepy (d 1093/1100, dau of Raoul II de Crepy)
  Not known by which wife (but presumably not the first) was ...
(E) Gilbert de Venables of Kinderton (a 1086) not mentioned by GenEU
  (2) Etienne I, Count of Troyes (d c1048)
  m. Adela
  (A) Eudes III, 'Odo of Champagne', Count of Troyes and Aumale (Albemarle) (d c1127)
  m. (c1060) Adela of Normandy (Adelaide (b c1030, d 1081/84, dau of Robert 'the Devil', Duke of Normandy)
  (i) Stephen = Etienne, Count of Aumale (Albemarle), Lord of Holderness (d 1127)
  m. Hawise de Mortimer (dau of Ralph de Mortimer of Wigmore)
  (a) William 'le Gros', Count of Aumale (Albemarle), Lord of Holderness (d 20.08.1179)
  m. Cicely, Lady of Skipton (dau of William FitzDuncan)
  ((1)) Hawise, Countess of Aumale, Lady of Holderness (d 11.03.1214)
m1. (14.01.1180) William de Mandeville, 3rd Earl of Essex, Earl of Albemarle (Count of Aumale) (dsp 1189/90)
  m2. (after 03.07.1190) William des Forts (Forz), Count of Aumale (d 1194/5)
  m3. Baudoin de Bethune, Count of Aumale (d 1211/2)
  ((2)) Amicia of Aumale
  m. _ Eston
  (b) Agnes (or Hawise) of Aumale GSY
  m1. William de Roumare (dvp 1150/2)
  m2. Adam Bruce, lord of Skelton GSY
  (c)+ other issue (d after 1150) - Stephen, Ingelgram
  According to BP1934 (Grace), son of either Stephen or Ingelgram, and nephew of William 'le Gros', was ...
  ((1)) William Crassus or le Gros of Sodbury (a 1203, Seneschel of Normandy)
  (3) Bertha de Blois = Bertha of Chartres (d 04.1085) GHJSY
  m1. (1018) Alain III, Duke of Brittany (b c997, d 01.10.1040) GHJSY
  m2. (after 14.05.1046) Hugues IV, Count de Maine (d 1051)
c. Thierry de Blois (d after 996)
  d. Agnes de Blois (a 1001)
  m. Guy, Vcte de Thouars
  e. Bertha de Blois
  iv. Emma de Blois (b 950, d after 1003) EGHJSWY
  m. (c968) William/Guillaume II/IV 'Fierebras' (Iron Arm), Count of Poitou, Duke of Aquitaine (b 937, d 03.02.993/5) EGHJSWY
  v. Hildegarde de Blois
  m1. Bouchard de Montmorency
  m2. Hugues de Chateaudun
  m2. Richildis (d 892, either de Blois or de Bourges)
  B. Richard, Archbishop of Bourges (d 969)

Main source(s): GenEU (Blois1) with some support and some contradiction from 'Royal Genealogies'
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