Napoléon Gallant was born in Tignish, PEI on July 15, 1838 to Sylvain Haché-Gallant and Marie Gaudet. He married Catherine Clark, who was born in 1842, in St. Simon and St. Jude Roman Catholic Church, Tignish, Prince Edward Island, Canada on November 10, 1863. Father D. Jerome McIssac officiated.

When Catherine and Napoléon were first married, they lived with Napoléon's parents, Sylvain Haché-Gallant and Marie Gaudet Gallant on Lot One, Nail Pond, Tignish, P. E. I. This home was built by Sylvain and his grandfather Prospère Gallant. It was later willed to Napoléon's son, James. Both Napoléon and Catherine died there.

Napoléon was a farmer and a Stage Coach Clerk for the Post Office. He also worked for J. C. Pope who owned a fishing company. Catherine Clark was the daughter of John and Mary Shreenan Clark (each lot on P. E. I. encompassed thousands of Acres, so many families were living on the same lot or district). Napoléon and Catherine had eleven children born in Tignish, P. E. I.

Napoléon died in Tignish, PEI on February 20, 1926. Catherine died in 1933.