Wyndham Wentworth Knatchbull-Hugessen, 3rd Baron Brabourne (21 September 1885 – 11 March 1915) was a British peer. He was killed in action with the Grenadier Guards on 11 March 1915, and is commemorated at Le Touret.
He was a noted ornithologist and co-wrote 'The Birds of South America' in 1912.
In 1911 he was one of the 112 peers who voted against the passing of the Parliament Act 1911.