William Thomas Petty-FitzMaurice, Earl of Kerry, styled Earl of Wycombe between 1811–1818, was an Anglo-Irish aristocrat and Whig Member of Parliament for Calne, Wiltshire. He was the heir to his father, Henry Petty-Fitzmaurice, 3rd Marquess of Lansdowne, but died aged only 25.
- Occupation
- politician
- Position held
- member of the 12th Parliament of the United Kingdom, member of the 11th Parliament of the United Kingdom
- Citizenship
- United Kingdom of Great Britain and Ireland
- Born
- March 30, 1811