Courtemanche is a French surname derived from various places in France named Courtemanche and Courdemanche (ultimately derived from Latin cortis dominica, "lord’s farm or estate").
Notable people with the surname include:
David Courtemanche (born 1964), Canadian politician Gil Courtemanche (1943–2011), Canadian journalist and writer Henri Courtemanche (1916–1986), Canadian politician Michel Courtemanche (born 1964), Canadian comedian and actor
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