This road is named to honour Major Addison Alexander Mackenzie, MC.
Addison Alexander "Lex" Mackenzie was born in 1885 in Richmond Hill. He originally pursued a military career and in 1912 joined the Governor-General's Body Guard (in 1936 this regiment was amalgamated with The Mississauga Horse to become The Governor-General's Horse Guards).
He was transferred to 4th Canadian Mounted Rifles and arrived in France in 1915. He was wounded and decorated for valour (Military Cross) at the Battle of the Somme in 1916, and was later wounded at Vimy Ridge.
After the war, Mackenzie left the army and returned to the family farm and took up farming. He entered municipal politics, serving as a member of the Village Council and later as reeve. He was elected member of the Provincial Legislature for York North in 1945, and represented the riding until his retirement at the 1967 election. He died in 1970.
