Hugh Hume-Campbell, 3rd Earl of Marchmont

Hugh Hume-Campbell, 3rd Earl of Marchmont PC FRS (15 February 1708 – 10 January 1794), styled Lord Polwarth between 1724 and 1740, was a Scottish politician who sat in the House of Commons from 1734 until 1740 when he succeeded to the peerage as Earl of Marchmont.

He was educated at a private school in London from 1716 and travelled abroad to Utrecht and Franeker in the Netherlands from 1721.

[1] Marchmont was 'a man of most distinguished talents and learning; he had read... deeply in the classics, history and in civil law'.

The claim to his junior title Lord Polwarth was vested in his granddaughter Anne Anstruther.

[4] No illegitimate son is mentioned by Thomas Finlayson Henderson writing in the Dictionary of National Biography;[5] George Rose's own entry in that same edition states: 'Later gossip, which made him out a natural son of Lord Marchmont [see Hume, Hugh, third Earl of Marchmont], an apothecary's apprentice, or a purser's clerk, may safely be disregarded', showing the lack of exact detail attached to the claim (as it was in fact George Rose's father David that was said to have been Marchmont's illegitimate son).