General Sir William Charles Giffard Heneker, KCB, KCMG, DSO (22 August 1867 – 24 May 1939) was a Canadian soldier who served with the British Army in West Africa, India, and then later on the Western Front during the First World War. A notable military strategist and tactician, he became one of the most experienced and highly decorated Canadians in the British Empire, and one of only a handful of Canadians to reach the rank of full general.