Charles Hay, 14th Marquess of Tweeddale

Charles David Montagu Hay, 14th Marquess of Tweeddale (born 6 August 1947) is a British peer. He inherited his title from his twin brother Edward, who is best remembered for his speech in the House of Lords on the Bosnian Civil War.

Lord Tweeddale is one of the few British peers ever to succeed an older twin brother in the title. Others include the 4th Earl of Durham and the 3rd Viscount Knutsford. Although the 3rd Marquess of Linlithgow and the first Baron Glendevon (formerly Lord John Hope) were twins, both were succeeded by their sons.

The heir presumptive is the current Marquess's younger brother, Alistair, Master of Tweeddale.

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