William Kerr, 5th Marquess of Lothian

General William John Kerr, 5th Marquess of Lothian KT (13 March 1737 – 4 January 1815) was a British soldier and peer, styled Lord Newbottle until 1767 and Earl of Ancram from 1767 to 1775.

He was the son of William Kerr, 4th Marquess of Lothian and succeeded to the title in 1775.

He married Elizabeth Fortescue, daughter of Chichester Fortescue of Dromisken, Co. Louth and Elizabeth (née Wesley), on 15 July 1762. They had nine children:

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