William FitzWilliam, 1st Earl of Southampton, was an English courtier and soldier. He was the third son of Sir Thomas FitzWilliam of Aldwark and Lady Lucy Neville, daughter of John Neville, 1st Marquess of Montagu.
- Occupation
- diplomat, politician, admiral
- Position held
- Member of Parliament in the Parliament of England, Member of the 1529-36 Parliament, Member of the 1536 Parliament, Lord High Admiral
- Born
- 1490
- Died
- October 15, 1542