The story
Apparently the spelling Lardo was first chosen, the name of a brand of cooking fat (from lard + o), which quickly became Lardeau as an alternative. The Lardeau spelling was later adopted officially.
Etymology from Wiktionary, CC BY-SA 4.0.
Lardeau
Today it means: A community and former mining town on Kootenay Lake in the Kootenay region of British Columbia, Canada. Full definition →