Source: April 1918 casualty.
Family Search: When Private John Karn Hendren was born on 22 August 1896, in Asphodel Township, Peterborough, Ontario, Canada, his father, John Alexander Hendren, was 36 and his mother, Elizabeth Jane Ruttan, was 34. He lived in Ontario, Canada in 1896 and Peterborough, Ontario, Canada for about 10 years. He registered for military service in 1916. He died on 2 April 1918, in Arras, Pas-de-Calais, France, at the age of 21, and was buried in Aubigny, Pas-de-Calais, France.
History of the 18th Battalion CEF, "The Fighting Eighteenth" 