Janvier is a surname from French. Notable people with this surname include:Alex Janvier (1935–2024), First Nations painter in Canada Ambroise Janvier (1613–1682), French benedictine Antide Janvier (1751–1835), French clockmaker Bernard Janvier, French general Caroline Janvier, French politician Eric Janvier, French businessman Louis-Joseph Janvier (1855–1911), Haitian journalist, diplomat and novelist Margaret Thomson Janvier (1844–1913), American writer, sister of Thomas Marie-Ève Janvier, French Canadian singer Maxime Janvier, French tennis player Paul Janvier, a pseudonym used by Algis Budrys Philippe Janvier, French paleontologist Philippe Janvier (actor), French actor Thomas Allibone Janvier (1849–1913), American writer and historian, brother of Margaret Ulysse-Janvier Robillard (1826–1900), Quebec merchant and political figure