William McKenzie Thomson MC, DFC (15 September 1898 – 9 July 1987) was a Canadian First World War flying ace, officially credited with 26 victories while flying Bristol Fighters with 20 Squadron of the Royal Flying Corps and Royal Air Force.
He showed fine determination to close with the enemy, and set a splendid example of enterprise and gallantry."
This officer has destroyed thirteen enemy machines, invariably displaying courage, determination and skill.
On a recent occasion, in company with eight other machines, his formation was attacked by twenty-five scouts; he shot one down.
On another occasion his formation of ten machines engaged between twenty and thirty Fokkers; in the combat that ensued this officer shot down one out of the four that were destroyed."