Marquess of Lansdowne is a title in the Peerage of Great Britain created in 1784, and held by the head of the Petty-FitzMaurice family. This branch of the family descends from the Hon. John Petty-Fitzmaurice (originally John Fitzmaurice), second son of Thomas Fitzmaurice, 1st Earl of Kerry (see the Earl of Kerry for earlier history of the family), and his wife Anne, the daughter of the noted political economist Sir William Petty (whose wife had been created Baroness Shelburne and whose two sons had been created Baron Shelburne and Earl of Shelburne respectively, but who had died without heirs; see these titles for more information). In 1751 he succeeded to the estates of his maternal uncle Henry Petty-FitzMaurice, 1st Earl of Shelburne, and assumed by Royal license the surname of Petty in lieu of FitzMaurice. The same year he was created Baron Dunkeron and Viscount FitzMaurice in the Peerage of Ireland. In 1753 the earldom held by his uncle was revived when he was made Earl of Shelburne, in the County of Wexford, in the Peerage of Ireland. He later represented Wycombe in the House of Commons as a Whig. In 1760 he was created Baron Wycombe, of Chepping Wycombe in the County of Buckingham, in the Peerage of Great Britain, which gave him an automatic seat in the British House of Lords.

Henry Petty-Fitzmaurice may refer to:

Henry Charles Keith Petty-Fitzmaurice, 5th Marquess of Lansdowne KG GCSI GCMG GCIE PC (14 January 1845 – 3 June 1927) was a British statesman who served successively as the fifth Governor General of Canada, Viceroy of India, Secretary of State for War, and Secretary of State for Foreign Affairs. He has the distinction of having held senior positions in both Liberal Party and Conservative Party governments.

Early life and career, 1845–1882

The great-grandson of the British Prime Minister Lord Shelburne (later 1st Marquess of Lansdowne), and the eldest son of Henry Petty-Fitzmaurice, 4th Marquess of Lansdowne and his wife, Emily, 8th Lady Nairne, Henry Charles Keith Petty-Fitzmaurice was born in London in 1845. He held the courtesy title Viscount Clanmaurice from birth until 1863 and then the courtesy title Earl of Kerry until he succeeded to the marquessate in 1866. Upon his mother's death in 1895, he succeeded her as the 9th Lord Nairne in the Peerage of Scotland.