noun
- William Petty Fitzmaurice, 2nd Earl of, 1st Marquess of Lansdowne. William Petty Fizmaurice Lansdowne.
noun
- 2nd Earl of, title of William Petty Fitzmaurice, also called (from 1784) 1st Marquess of Lansdowne. 1737–1805, British statesman; prime minister (1782–83)