Ruler · 1071 – 1126

William IX of Aquitaine

Lived 1071 – 1126; composer, poet, writer. Duke of Aquitaine of Duchy of Aquitaine, 1086 – 1126.

Wikidata's English label: Guillaume IX.

For the full story, the article on Wikipedia (CC BY-SA 4.0); this page holds what the record says of the reign.

Lived: 1071 – 1126; 55 years
In office: 40 years; one reign
Lines: 1; Duchy of Aquitaine
Left it: ending not on record; nothing on record

Duke of Aquitaine

Duchy of Aquitaine · the 7th of 10 dated reigns · 845 – 1453

3 before

Louis the Stammerer866 – 867

William VII, Duke of Aquitaine1039 – 1058

William VIII, Duke of Aquitaine1058 – 1086

William IX of Aquitaine1086 – 1126

William X, Duke of Aquitaine1126 – 1137

Eleanor of Aquitaine1137 – 1204

Henry VI of England1422 – 1453

ending not on recorda second row: a reign that began before the last had ended — rival claimants, or a shared thronethis entry

Reigned 1086 – 1126 · 40 years

Came to it: inheritedthe child of the ruler before, on record
Left it: ending not on recordnothing on record: no death date to read the end against

William inherited the duchy at the age of fifteen upon the death of his father.

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Wikidata Q5351 (CC0) · the reigns from Wikidata's P39 terms, the rulers' own articles read by grammar (sentences quoted above, CC BY-SA 4.0) and Kokkonen & Sundell where they code the line · data built 2026-10-06 · Pastlas v2.9.1, by Oleh Voronko. The published atlas and its data are for non-commercial use.