Wenceslaus of Płock Duke of Masovia (1293–1336) Parents Kunigunde of Bohemia Bolesław II of Masovia Children Anna of Plock Bolesław III of Masovia Siblings Siemowit II of Masovia Euphrosyne of Masovia Trojden I, Duke of Masovia Anna of Mazovia Partners Elizabeth Giedyminowicz
