William VIII ( – 25 September 1086), born Guy-Geoffrey (''Gui-Geoffroi''), was

duke of Gascony The Duchy of Gascony or Duchy of Vasconia ( eu, Baskoniako dukerria; oc, ducat de Gasconha; french: duché de Gascogne, duché de Vasconie) was a duchy located in present-day southwestern France and northeastern Spain, an area encompassing the ...

(1052–1086), and then

duke of Aquitaine The Duke of Aquitaine ( oc, Duc d'Aquitània, french: Duc d'Aquitaine, ) was the ruler of the medieval region of Aquitaine (not to be confused with modern-day Aquitaine) under the supremacy of Frankish, English, and later French kings. As suc ...

and

count of Poitiers Among the people who have borne the title of Count of Poitiers (or ''Poitou'', in what is now France but in the Middle Ages became part of Aquitaine) are: *Bodilon * Warinus (638–677), son of Bodilon * Hatton (735-778) Carolingian Counts ...

(as William VI) between 1058 and 1086, succeeding his brother William VII (Pierre-Guillaume).

Life

Guy-Geoffroy was the youngest son of

William V of Aquitaine William the Great (french: Guillaume le Grand; 969 – 31 January 1030) was duke of Aquitaine (as ) and count of Poitou (as or III) from 990 until his death. Upon the death of the emperor Henry II, he was offered the kingdom of Italy ...

by his third wife Agnes of Burgundy. He was the brother-in-law of

Henry III, Holy Roman Emperor Henry III (28 October 1016 – 5 October 1056), called the Black or the Pious, was Holy Roman Emperor from 1046 until his death in 1056. A member of the Salian dynasty, he was the eldest son of Conrad II and Gisela of Swabia. Henry was raised ...

who had married his sister, Agnes de Poitou. He became Duke of Gascony in 1052 during his older brother William VII's rule. Gascony had come to Aquitanian rule through William V's marriage to Prisca (a.k.a. Brisce) of Gascony, the sister of Duke Sans VI Guilhem of Gascony. William VIII was one of the leaders of the allied army called to help Ramiro I of Aragon in the Siege of Barbastro (1064). This expedition was the first campaign organized by the papacy, namely

Pope Alexander II Pope Alexander II (1010/1015 – 21 April 1073), born Anselm of Baggio, was the head of the Roman Catholic Church and ruler of the Papal States from 1061 to his death in 1073. Born in Milan, Anselm was deeply involved in the Pataria ref ...

, against a Muslim town and stronghold in the Emirate of Zaragoza, and the precursor of the later

Crusades The Crusades were a series of religious wars initiated, supported, and sometimes directed by the Latin Church in the medieval period. The best known of these Crusades are those to the Holy Land in the period between 1095 and 1291 that were ...

movement. Aragon and its allies conquered the city, killed and enslaved its inhabitants and collected an important booty. However, Aragon lost the city again in the following years. During William VIII's rule, the alliance with the southern kingdoms of modern Spain was a political priority as shown by the marriage of all his daughters to Iberian kings.

Marriage and children

William married three times and had at least five children. After he divorced his first two wives, the first due to infertility, he married a third time to a much younger woman who was also his cousin Robert I of Burgundy's daughter. This marriage produced a son, but William VIII had to visit Rome in the early 1070s to persuade the pope to recognize his children from his third marriage as legitimate. *First wife: of

Périgord Périgord ( , ; ; oc, Peiregòrd / ) is a natural region and former province of France, which corresponds roughly to the current Dordogne department, now forming the northern part of the administrative region of Nouvelle-Aquitaine. It is divi ...

, daughter of Count Aldabert II of Périgord (divorced November 1058), no children. She became a nun at Saintes. *Second wife: Matoeda (divorced May 1068) # Agnes, married

Alfonso VI of Castile Alphons (Latinized ''Alphonsus'', ''Adelphonsus'', or ''Adefonsus'') is a male given name recorded from the 8th century ( Alfonso I of Asturias, r. 739–757) in the Christian successor states of the Visigothic kingdom in the Iberian peninsula ...

*Third wife: Hildegarde of Burgundy (daughter of duke Robert I of Burgundy) # Agnes (died 1097), married Peter I of Aragon #

William IX of Aquitaine William IX ( oc, Guilhèm de Peitieus; ''Guilhem de Poitou'' french: Guillaume de Poitiers) (22 October 1071 – 10 February 1126), called the Troubadour, was the Duke of Aquitaine and Gascony and Count of Poitou (as William VII) between 1086 a ...

Life

Marriage and children

Notes

References

Sources

See also