Acorn Lake is named in honour of Private Wilfred Lorne Acorn. The lake was dedicated on April 5, 1961 by the Government of Saskatchewan.
Wilfred Lorne Acorn was born in Prince Albert, Saskatchewan, in February 1918. He was employed on the family farm near Davis, Saskatchewan, south-east of Prince Albert, until his enrollment in March 1942. Following his training, he became a member of the 1st Canadian Parachute Battalion. Private Wilfred Lorne Acorn was killed in action on February 18, 1945 during operations to clear the west bank of the Rhine River. He is buried at Groesbeek Canadian War Cemetery, The Netherlands.