Question: Who is Wenceslaus Of Krosno's paternal grandfather?
Sentence (from "Wenceslaus of Krosno"): Wenceslaus of Krosno (1391 – before 4 February 1431), a Duke of Żagań-Głogów during 1397–1412 (as co-ruler of his brother), during 1412–17 ruler over Głogów (with his brothers as co-rulers), since 1417 ruler over Krosno Odrzańskie, Świebodzin and Bytnica.
Relevant evidence: No