William II was the third son of Frederick III of Sicily and Eleanor of Anjou. He inherited the Duchy of Athens after the death of his elder brother Manfred on 9 November 1317.
- Occupation
- monarch
- Position held
- Duke of Neopatras, duke of Athens
- Citizenship
- Malta
- Born
- 1312
- Died
- August 22, 1338, 1338