Vacher is a surname of the French origin. Its literal translation means a keeper of stock or cattle or a herdsman but is generally used by people whose ancestry is traced to the cow-herders. It is also used by a small group of people in India. People with the name include:Antoine Vacher (1873–1920), French geographer, Chris Vacher, British television news presenter Georges Vacher de Lapouge (1854–1936), French anthropologist and theoretician of eugenics and racialism Joseph Vacher (1869–1898), French serial killer, executed by guillotine Laurent-Michel Vacher (1944–2005), French Canadian philosopher, writer, and journalist Paul Vacher, French perfumer Polly Vacher, English aviator Sydney Vacher, English architect Thomas Brittain Vacher (1805–1880), English lithographer, legal stationer, and printer William Herbert Vacher (1826–1899), British merchant and banker Charles Vacher, (1818–1883), painter in watercolours