Castonguay
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English[edit]
Proper noun[edit]
Castonguay (plural Castonguays)
- A surname.
Statistics[edit]
- According to the 2010 United States Census, Castonguay is the 14257th most common surname in the United States, belonging to 2102 individuals. Castonguay is most common among White (96.43%) individuals.