William IX, Count of Poitiers

Not to be confused with William IX, Duke of Aquitaine.

William, Count of Poitiers (17 August 1153 – 1156) was the first son of King Henry II of England and Duchess Eleanor of Aquitaine.

William
William, from an early 14th century genealogical tree British Library Royal MS 14 B VI.
Born	17 August 1153[1] Normandy or Poitiers, Aquitaine[1]
Died	1156 (aged 2–3) Wallingford Castle, Berkshire
Burial	Reading Abbey, Berkshire
House	Plantagenet-Angevin[nb 1]
Father	Henry II, King of England
Mother	Eleanor, Duchess of Aquitaine

Burial site at Reading Abbey of William with his great-grandfather Henry I Beauclerc

William is reported to have died either at the age of 2 in April 1156,^[3] or at the age of 3 on 2 December 1156,^[4][5] after suffering a seizure at Wallingford Castle. He was buried in Reading Abbey at the feet of his great-grandfather Henry I.^[3]

Notes

1. Historians are divided in their use of the terms Plantagenet and Angevin in regard to Henry II and his children. Some class Henry II to be the first Plantagenet king of England; others refer to Henry II, Richard I, and John as the Angevin dynasty, and consider Henry III to be the first Plantagenet ruler.^[2]