Prince William Augustus, Duke of Cumberland (26 April 1721 – 31 October 1765) was the third and youngest son of King George II of Great Britain and Ireland and his wife, Caroline of Ansbach. He was Duke of Cumberland from 1726.

He is best remembered for his role in putting down the Jacobite Rising at the Battle of Culloden in 1746, which made him immensely popular throughout Britain. He is often referred to by the nickname given to him by his Tory opponents: 'Butcher' Cumberland. Despite his triumph at Culloden, he had a largely unsuccessful military career.

Following the Convention of Klosterzeven in 1757, he never again held active military command and switched his attentions to politics and horse racing.

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