Question: Who is Nicholas I Of Opole's paternal grandfather?
Sentence (from "Nicholas I of Opole"): Nicholas I of Opole (– 3 July 1476) was a duke of Opole since 1437 (until 1439 with his brother as co-ruler), Duke of Brzeg from 1450, ruler over Kluczbork from 1451 and Duke of Strzelce, Niemodlin and Olesno from 1460.
Relevant evidence: No