Guillaume VIII, duke of Aquitaine

Also known as Guy- Geoffroy and Guillaume VI de Poitou.

Count of Poitou

Duke of Aquitaine

Events

Date of Birth: 1023.

Place of Birth: unknown.

The date is given by Cawley. Other sources give 1025.

Date of Death: 25 September 1086.

Place of Death: Chizé, near Niort, Poitou.

The date and place are given by Cursente and by Dillange (p. 159). Père Anselme (2:519) and Cokayne (p. 76) give 24 September as the date.

Place of Burial: Poitiers, église abbatiale de Saint-Jean l'Evangéliste de Montierneuf.

The place is given by père Anselme (2:519), by Cokayne (p. 76), and by Dillange (p. 159).

Relationships

Father: Guillaume V “le Grand", duke of Aquitaine.

This relationship is given by père Anselme (2:518), by Cokayne (p. 74), by Dillange (p. 153), by Barthélemy (p. 611), and by Cursente.

Mother: Agnès de Mâcon.

This relationship is given by père Anselme (2:518), by Cokayne (p. 74), by Dillange (p. 153), by Barthélemy (p. 611), and by Cursente.

Spouse: Aina de Périgord. Married January 1044, repudiated 1058.

This relationship is given by père Anselme (2:519), by Cokayne (p. 76), and by Cursente. Père Anselme and Cokayne do not give a first name. Some sources, for example Dillange (p. 159), give the first name as Garsende.

Spouse: Mathilde. Married after November 1058, repudiated after May 1068.

This relationship is given by père Anselme (2:519), by Cokayne (p. 76), by Dillange (p. 159), and by Cursente.

Spouse: Audearde (Hildegarde) de Bourgogne. Married March 1069, separated 1076.

This relationship is given by père Anselme (2:519), by Cokayne (p. 76), by Dillange (p. 159), and by Cursente.

Children (by Mathilde):

(Complete source citations for facts about the children on this page are currently outside of the scope of this project. Most information below comes from Cawley.)

Agnès d’Aquitaine (born about 1059) married (1) Alfonso VI, king of Castile; married (2) Hélie, count of Maine. [Some sources state that she did not exist.]

Children (by Audearde):

Guillaume IX (22 October 1071 - 10 February 1126), duke of Aquitaine, married Philippa de Toulouse.

Hugues d’Aquitaine (died after 1126).

Agnes d’Aquitaine (1072 - 6 June, 1097 or 1098) married Pedro I, king of Aragon and Navarre.

References

Anselme de Sainte-Marie. Histoire Généalogique et Chronologique de la Maison Royale de France, des Pairs, Grands Officiers de la Couronne, de la Maison du Roy et des Anciens Barons du Royaume. 9 Volumes (Paris: 1726-1733).

Barthélemy, Dominique. L’an mil et la paix de dieu: la France chrétienne et féodale 980-1060, (Fayard, 1999).

Cawley, Charles. “Guy d'Aquitaine” in Medieval Lands: A prosopography of medieval European noble and royal families.

Cokayne, G.E., and G.W. Watson. The Seize Quartiers of the Kings and Queens of England. (1896).

Cursente, B. “Wilhelm VIII.” in Lexikon des Mittelalters. Band 9 (Stuttgart: 1998).

Dillange, Michel. Les comtes de Poitou: ducs d’Aquitaine (778-1204) (Mougon: Geste éditions, 1995).