Adrian Norton Knatchbull-Hugessen, QC VD (5 July 1891 – 30 March 1976) was a British-born Canadian lawyer and senator.

Knatchbull-Hugessen was born in Ashford, Kent, England on 5 July 1891, the son of Edward Hugessen Knatchbull-Hugessen, 1st Baron Brabourne, and Ethel Mary Walker, daughter of Sir George Gustavus Walker.

He was educated at Eton College, but emigrated to Canada to study law at McGill University in Montreal.

He served as the President of the Liberal Party of Canada from 1940 to 1943 and Deputy Leader of the Government in the Senate from 1950 to 1952.

Margaret (Peggy) was the only daughter of George Herrick Duggan (1862–1946) and Mildred Scarth Stevenson.