Question: Who is Bolesław Of Kuyavia's paternal grandfather?
Sentence (from "Mieszko III the Old"): Mieszko III the Old( c. 1126/27 – 13 March 1202), of the royal Piast dynasty, was Duke of Greater Poland from 1138 and High Duke of Poland, with interruptions, from 1173 until his death.
Relevant evidence: No