Julius Roentgen (1855)

Alfons Diepenbrock (1862–1921)

Jan Brandt-Buys (1868)

Cornelius Dopper (1870)

Dirk Schaefer (1874)

Bernard van Dieren (1884)

Dirk Foch (1886)

Willem Pijper (1894)

Swiss

Hans Huber (1852–1921)