Back I Gilyom de Şamplit Azerbaijani Гийом дьо Шамплит Bulgarian Guillem I d'Acaia Catalan Vilém ze Champlitte Czech Wilhelm I. von Champlitte German Γουλιέλμος Σαμπλίτης Greek Guillermo de Champlitte Spanish ویلیام شالیت Persian Guillaume Ier de Champlitte French Guillerme de Champlitte Galician
| William I | |
|---|---|
| Prince of Achaea | |
 Coat of Arms of William of Champlitte | |
| Reign | 1205-1209 |
| Successor | Geoffrey I |
| Born | 1160s |
| Died | 1209 |
| Spouse | Alais of Meursault Elisabeth of Mount-Saint-Jean |
| House | |
| Father | Odo I of Champlitte |
| Mother | Sybille |
William I of Champlitte (French: Guillaume de Champlitte) (1160s-1209) was a French knight who joined the Fourth Crusade and became the first prince of Achaea (1205–1209).[1][2][3]