Question: Who is the paternal grandfather of Jan Ii The Mad?
Sentence (from "Jan II the Mad"): Jan II the Mad also known as the Bad, the Wild or the Cruel (16 April 1435 – 22 September 1504), was a Duke of Żagań-Przewóz since 1439 (with his brothers as co-rulers until 1449), from 1449 Duke of Przewóz (as co-ruler of his younger brother), during 1461–1468 and briefly in 1472 Duke of Żagań and during 1476–1488 Duke of half-Głogów
Relevant evidence: No