Meaning of Last Name

Janssen may refer to: * Zacharias Janssen (1580–1638), a Dutch spectacle-maker; invented a compound microscope. * Johannes Janssen (1829–1891), German historian. * Pierre Jules César Janssen (1824–1907), French astronomer. * Saint Arnold Janssen (1837–1909), German founder of the Society of the Divine Word. * Benno Janssen (1874-1964), American architect * Constant Janssen (1895-1970), Belgian founder of predecessor of Janssen Pharmaceutica. * Famke Janssen (born 1965), Dutch actress. * David Janssen (1931–1980), American film and television actor. * Horst Janssen (1929–1995), German printmaker. * Paul Janssen (1926–2003), Belgian founder of Janssen Pharmaceutica. * Jan Janssen (born 1940), a Dutch professional cyclist. * Ruud Janssen (born 1959), Dutch Fluxus and mail artist. * Bert Janssen (born 1958), Dutch author, film maker and world explorer. * Casey Janssen (born 1981), American baseball player for the Toronto Blue Jays