Captain William Frederick Waldegrave, Viscount Chewton (29 June 1816 – 8 October 1854) was a British Army officer.

While still at school, he served as a midshipman aboard his father's ship, HMS Seringapatam from 1829–31 and later graduated from Trinity College, Cambridge in 1837.

In 1846, Chewton fought in the Battle of Sobraon and then captained the 6th Regiment of Foot stationed at the Cape of Good Hope in 1847 and then the Royal Scots Fusiliers in Scotland in 1848.

Chewton later fought in the Battle of Alma in September 1854, but died of his wounds a few weeks later.

She died 11 April 1902, at Bookham Lodge, Cobham, Surrey, in her 80th year, of pneumonia.