Prince William Augustus (April 26, 1721 [N.S.]

– October 31, 1765), is a younger son of George II of Great Britain and Caroline of Ansbach, and Duke of Cumberland from 1726.

He is generally best remembered for his role in putting down the Jacobite Rising at the Battle of Culloden in 1746, and as such is also known as "Butcher" Cumberland.

After Culloden, he goes on to a largely unsuccessful military career, and following the Convention of Klosterzeven in 1757, he never holds active military command, and switches his attentions to politics and horse racing.