Gerardus Johannes 'Jan' Teunissen (1898 - 1975) was a Dutch film director. He made his debut as a director in the early 1930s with short avant-garde films Pierement (1931) and Sjabbos (1932). On request, he then directed the first official Dutch sound film: Willem van Oranje. When the film flopped, he gave up on being a director and worked as an editor on a number of Dutch feature films.