William IX, Count of Poitiers
| William | |
|---|---|
William, from an early 14th century genealogical tree British Library Royal MS 14 B VI. | |
| Born | 17 August 1153 Normandy or Poitiers, Aquitaine |
| Died | 1156 (aged 2–3) Wallingford Castle, Berkshire |
| Burial | Reading Abbey, Berkshire |
| House | Plantagenet / Angevin |
| Father | Henry II, King of England |
| Mother | Eleanor, Duchess 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 is reported to have died either at the age of 2 in April 1156, or at the age of 3 on 2 December 1156, after suffering a seizure at Wallingford Castle. He was buried in Reading Abbey at the feet of his great-grandfather Henry I.