Question: Who is the paternal grandfather of Jan I Of Opole?
Sentence (from "Władysław Opolski"): Władysław of Opole( – 27 August/ 13 September 1281/ 2) was a Duke of Kalisz during 1234 – 1244, Duke of Wieluń from 1234 to 1249 and Duke of Opole – Racibórz from 1246 until his death.
Relevant evidence: No