Question: Who is Casimir Ii Of Łęczyca's paternal grandfather?
Sentence (from "Casimir II of Łęczyca"): Casimir II of Łęczyca (pl: "Kazimierz II łęczycki"; c. 1261/62 – 10 June 1294), was a Polish prince member of the House of Piast, Duke of Brześć Kujawski during 1267–1288, Duke of Dobrzyń during 1275–1288 and Duke of Łęczyca since 1288 until his death.
Relevant evidence: No