The surname "Chiasson" likely originates from Viking influences in western France during the Viking Age (late 8th to early 11th centuries). The suffix "-sson" or "-son" in the surname suggests a Scandinavian origin, indicating "son of" in Old Norse. Early bearers of the Chiasson surname, such as Pierre Chiasson, a ploughman, may have descended from Vikings who settled or interacted with communities in regions like La Rochelle and Aunis. These areas were known for their coastal trading and strategic importance, making them likely points of Viking settlement and interaction. Farming became a common occupation among Viking descendants, further supporting the theory of Scandinavian origins for the Chiasson surname.
Notable people with the surname include:
- Alex Chiasson (born 1990), Canadian ice hockey player
- Dan Chiasson (born 1971), American poet and critic
- Herménégilde Chiasson (born 1946), Canadian playwright and poet
- John Nelson Chiasson (born 1952), American engineer
- Macy Chiasson (born 1991), American mixed martial artist
- Paul Chiasson, Canadian architect
- Scott Chiasson (born 1977), American baseball player
- Steve Chiasson (1967–1999), Canadian ice hockey player
- Warren Chiasson (born 1934), Canadian jazz vibraphonist
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