For 10 points, name this Czech theologian whose followers were part of a namesake series of wars in the early 1400s.
This man had a notable series of debates with John Stokes.  Jean de Charlier de Gerson brought the attention of Konrad von Vechta to several parts of this man's treatise De sex erroribus, and the synod of Bohmisch-Brod was called to deal with issues this man raised.  Indirectly affected by fallout over the Council of Pisa, this man attacked the idea of raising funds for a crusade against Ladislaus of Naples by selling indulgences.  Excommunicated in 1411 due to his Wycliffite preachings, he was condemned at the Council of Constance and burned at the stake.  For 10 points, name this Czech theologian whose followers were part of a namesake series of wars in the early 1400s.
This man had a notable series of debates with John Stokes.  
Jan (or John) {Hus}