Halphen is a surname. Notable people with the surname include: Éric Halphen (born 1959), French judge Étienne Halphen (1911–1954), French mathematician Eugène Halphen (1820–1912), French historian, poet and book editor Fernand Halphen (1872–1917), French composer Georges Henri Halphen (1844–1889), French mathematician Gustave Halphen (d. 1872), French diplomat Louis Halphen (1880–1950), French medieval-historian Baroness Noémie de Rothschild (1888–1968), born Noémie Halphen, French philanthropist Jewish surnames French-language surnames Occupational surnames