'''Billaut''' is a French surname. Notable people with the surname include:
* Adam Billaut (1602–1662), French carpenter, poet and singer * Hervé Billaut (born 1964), French classical pianist * Jean-Michel Billaut (1945–2025), French systems analyst and internet personality * Julien Billaut (born 1981), French slalom canoeist
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Category:French-language surnames