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Guillaume de Poitou Duc d'Aquitaine (V), Comte de Poitou (II)
(Abt 0969-1030)
Agnès de Mâcon
(Between 0990/0995-1068)
Robert de France Duc de Bourgogne
(Abt 1011/1012-1076)
Ermengarde d'Anjou
(Abt 1018-1076)
Guy de Poitou Duc d'Aquitaine (Guillaume VIII), Comte de Poitou
Audéarde de Bourgogne
(Abt 1050-After 1120)
Guillaume IX d'Aquitaine Duc d'Aquitaine (IX), Comte de Poitou (VII)


Family Links

1. Ermengarde d'Anjou
2. Philippa de Toulouse

3. Amauberge
  • Raymond d'Aquitaine Prince of Antioch
  • Henri d'Aquitaine

Guillaume IX d'Aquitaine Duc d'Aquitaine (IX), Comte de Poitou (VII)

  • Born: 22 Oct 1071
  • Marriage (1): Ermengarde d'Anjou in 1089
  • Marriage (2): Philippa de Toulouse in 1094
  • Marriage (3): Amauberge
  • Died: 10 Feb 1127 aged 55

  General Notes:

GUILLAUME d'Aquitaine, son of GUILLAUME VIII Duke of Aquitaine [GUILLAUME VI Comte de Poitou] & his third wife Hildegarde de Bourgogne [Capet] (22 Oct 1071-10 Feb 1126). The Chronicle of Saint-Maxence records the birth "1071 XI Kal Nov" of "Goffredo duci…Guillelmus filius". "Willelmi filius eius" subscribed the donation by "Willelmus dux Aquitanorum" of property to St Cyprien, Poitiers by charter dated [1073/87]. "Goffredus…dux Aquitanorum et Guillelmus filius eius" set entry conditions for monks at Saint-Hilaire de Poitiers by charter dated 1078 or 1079. He succeeded his father in 1086 as GUILLAUME IX Duke of Aquitaine, GUILLAUME VII Comte de Poitou. Albert of Aix records that "Willelmus comes et princeps Pictaviensium, de sanguine et origine Henrici tertii imperatoris Romanorum" crossed Hungary peacefully with "duce Bawariorum Welfone et…comitssa…Ida de marchia Osterrich", entered the territory of the Bulgars in which "duce Bulgarorum Guz" refused their passage into Adrianople (when "Rodulfus…de Scegonges ortus, cognatus ipsius Willelmi principis" was killed and "Hardewinus…de Sancto Medardo" captured), but that Guillaume captured "ducem Bulgarorum" who was forced to allow the pilgrims to continue, undated but in a passage adjacent to text which records events in 1101. According to Albert of Aix, after the army was dispersed in Asia Minor by the Turks, Duke Guillaume fled to "Longinath juxta Tursolt civitatem", from where he was rescued and brought to Antioch by Tancred's forces. "Aimericus de Ranconia vocatus filius Aimeri qui fuit male peremptus et filius Burgoniæ" donated "mariscum et verniatam quæ sunt sub molendino de Ternant" to the abbey of Ternant Ste-Marie by charter dated 1105, witnessed by "Willelmi ducis, Aldiardis comitissa". He was a troubadour and composer of lyric poetry. The Chronicle of Saint-Maxence records the death "1126 IV Id Feb" of "Willelmus dux Aquitanorum" and his burial "Pictavis civitate apud Novum Monasterium". The necrology of the Prieuré de Fontaines records the death "10 Feb" of "Guillermus dux Aquitanorum".

m firstly (1089, divorced 1090) as her first husband, ERMENGARDE d'Anjou, daughter of FOULQUES IV "le Rechin" Comte d'Anjou & his first wife Hildegarde de Baugency ([1068]-Jerusalem 1 Jun 1146). The Chronicle of Alberic de Trois-Fontaines refers to the daughter of "Fulco" as "comitissam Redonensem" but does not name her. "Fulco Andegavensis comes" donated property to Angers with the consent of "filiis meis Gaufrido et Fulconello et filia mea Ermengarde" by charter dated 23 Jun 1096. William of Tyre names her "Hermingerda", gives her father's name implying that she was born from his fifth marriage, and names her first husband "Pictaviensium comitis Willelmi", her divorce and her second husband "comes Brittaniæ". She married secondly ([1093]) as his second wife, Alain IV "Fergant"Duke of Brittany . The Gesta Consulum Andegavorum records that "comitissa Brittaniæ" was the daughter of Foulques & his first wife "filiam Lancelini de Baugenciaco", adding that she became a nun at "Jerusalem in ecclesia Sanctæ Annæ" after her husband died. "Fulco Andecavorum comes nepos Goffridi Martelli…consulis" donated property to Angers with the consent of "Ermenjarde filia sua comitissa Brittaniæ" by charter dated 12 Apr 1109. The necrology of Angers Cathedral records the death "Kal Jun" of "Ermengardis comitissa Britanniæ mater Conan ducis et soror Fulconis regis Hierosolymitani". The Annals of St Salvator Redon record that "Ermengardeque Alani conjugem, vere piam ac religiosam" was buried at the abbey of Redon.

m secondly (1094, divorced 1115) PHILIPPA [Mathilde] de Toulouse, daughter of GUILLAUME IV Comte de Toulouse & his second wife Emma de Mortain (-28 Nov 1117). The Chronicle of Saint-Maxence records the marriage of "Guillelmus" and "Philippam…filiam Willelmi comitis Tolosani et neptem Raimundi de Sancto Egidio". Robert of Torigny refers to, but does not name, "filiam unam" of "comes Tolosanus frater Raimundi comitis Sancti Ægidii"& his wife, who married "Guillermus comes Pictavensis et dux Aquitanorum". "Guillelmus…Aquitainie similiter et Vasconie dux et comes" confirmed donations to Sainte-Croix, Bordeaux by "genitor noster Guillelmus qui et Gaufridus vocatus est" with the consent of "Mathildis uxor…" by charter dated 23 Mar 1096. It is assumed that Mathilde and Philippa refer to the same person. "Willelmus comes et uxor mea Philippia, filia Willelmi comitis Tolosæ" donated property to Toulouse Saint-Sernin by charter dated Jul 1098. She is also named in an undated donation by Bertrand Comte de Toulouse which names her father but not her husband. "Philippæ comitissæ…Emmæ filia" reached agreement with "Bernardus-Atonis filius Ermengardis" by charter dated 1114. Orderic Vitalis recounts that "Hildegarde Ctss de Poitou" complained to the synod of Reims, held in Oct 1119 by Pope Calixtus II, that her husband had abandoned her for "Malberge wife of the vicomte de Châtellerault". She became a nun. The necrology of the Prieuré de Fontaines records the death "28 Nov" of "Philippa monacha, Pictavensis comitissa".

Mistress (1): AMAUBERGE [Dangerose], wife of AIMERY [I] Vicomte de Châtellerault, daughter of ---. She left her husband to live with Duke Guillaume, for which he was excommunicated. Ralph de Diceto´s Ymagines Historiarum record that "Willelmus comes Pictaviensium" left "uxori suæ" for "pellicem...Amalbergam",specifying that the resulting dispute lasted seven years. Orderic Vitalis recounts that "Hildegarde Ctss de Poitou" complained to the synod of Reims, held in Oct 1119 by Pope Calixtus II, that her husband had abandoned her for "Malberge wife of the vicomte de Châtellerault".

Duke Guillaume IX & his second wife had six children: Guillaume, Agnes and four daughters.

Duke Guillaume IX had two [probably illegitimate] children by [Mistress (1)]: Raymond and Henri.

Guillaume married Ermengarde d'Anjou, daughter of Foulques [IV] de Château-Landon Comte d'Anjou and Hildegarde de Baugency, in 1089. (Ermengarde d'Anjou was born about 1068, died on 1 Jun 1146 in Jerusalem, IL and was buried in Abbaye Saint-Sauveur de Redon, Redon, Ille-et-Vilaine, Bretagne, 35600, FR.)

Guillaume next married Philippa de Toulouse, daughter of Guillaume [IV] de Toulouse Comte de Toulouse and Emma de Mortain, in 1094. (Philippa de Toulouse died on 28 Nov 1117.)

Guillaume next married Amauberge.

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