When Napoléon Brochu was born on 5 May 1867, in Saint-Isidore, Dorchester, Quebec, Canada, his father, Jacob Brochu, was 34 and his mother, Aurélie Godbout, was 19. He married Marie Bouffard on 15 July 1889, in Saint-Isidore, Dorchester, Quebec, Canada. They were the parents of at least 8 sons and 8 daughters. He lived in Dorchester, Quebec, Canada in 1901 and Quebec, Canada in 1911. He died on 1 June 1953, in Saint-Isidore, Dorchester, Quebec, Canada, at the age of 86.