William VI (1004 – March 1038), called the Fat, was

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 su ...

and

Count of Poitou 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 IV) between 1030 and his death. He was the eldest son of William V the Great by his first wife, Adalmode of Limoges. Throughout his reign, he had to face the hostility of his stepmother, Agnes of Burgundy, the third wife of his father, who had remarried to

Geoffrey Martel Geoffrey, Geoffroy, Geoff, etc., may refer to: People * Geoffrey (name), including a list of people with the name * Geoffroy (surname), including a list of people with the name * Geoffrey of Monmouth (c. 1095–c. 1155), clergyman and one of the ...

, then

count of Vendôme Count (feminine: countess) is a historical title of nobility in certain European countries, varying in relative status, generally of middling rank in the hierarchy of nobility. Pine, L. G. ''Titles: How the King Became His Majesty''. New York: ...

. He entered into a war with Martel, who pretended to the government of the

Saintonge Saintonge may refer to: *County of Saintonge, a historical province of France on the Atlantic coast *Saintonge (region), a region of France corresponding to the historical province Places *Saint-Genis-de-Saintonge, a commune in the Charente-Mari ...

. On 20 September 1034, he was captured in the field at Moncontour, near

Saint-Jouin-de-Marnes Saint-Jouin-de-Marnes (, literally ''Saint-Jouin of Marnes'') is a former commune in the Deux-Sèvres department in western France. On 1 January 2019, it was merged into the new commune Plaine-et-Vallées.Saintes and

Bordeaux Bordeaux ( , ; Gascon oc, Bordèu ; eu, Bordele; it, Bordò; es, Burdeos) is a port city on the river Garonne in the Gironde department, Southwestern France. It is the capital of the Nouvelle-Aquitaine region, as well as the prefect ...

. He immediately reopened the war, but was defeated again and had to cede the isle of

Oléron The Isle of Oléron or Oléron Island (french: île d'Oléron, ; Saintongese: ''ilâte d'Olerun''; oc, illa d'Olairon or ; la, Uliarus insula, ) is an island off the Atlantic coast of France (due west of Rochefort), on the southern side of the ...

. William married Eustachie of Montreuil but had no known descendants. He reformed the administration of Poitiers by naming a provost, and died there, being succeeded by his half-brother

Odo Odo or ODO may refer to: People * Odo, a given name; includes a list of people and fictional characters with the name * Franklin Odo (born 1939), Japanese-American historian * Seikichi Odo (1927–2002), Japanese karateka * Yuya Odo (born 1990), J ...

. He was buried at

Maillezais Maillezais () is a Communes of France, commune in the Vendée Departments of France, department in the Pays de la Loire Regions of France, region in western France. It was once an island in the Marais Poitevin, until monks of the Maillezais Abbey ...

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* Dukes of Aquitaine, William 06 of Aquitaine Counts of Poitiers Burials at Maillezais Abbey 1004 births 1038 deaths {{france-noble-stub

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