John Henry Petty, 2nd Marquess of Lansdowne, known as Earl Wycombe between 1784 and 1805, was a British Whig politician who in Ireland was suspected of complicity in a republican conspiracy.
- Occupation
- politician
- Position held
- member of the 1st Parliament of the United Kingdom, member of the 16th Parliament of Great Britain, member of the 17th Parliament of Great Britain, member of the 18th Parliament of Great Britain
- Citizenship
- Kingdom of Great Britain
- Born
- May 2, 1765, December 6, 1765