Question: Who is Trojden Ii Of Płock's maternal grandmother?
Sentence (from "Wenceslaus of Płock"): Wenceslaus( Wańko) of Płock( Masovian dialect:" Wańko Puocky"; 1293/97 – 23 May 1336), was a Polish prince member of the House of Piast, Duke of Płock since 1313 and vassal of Bohemia from 1329.
Relevant evidence: No