Question: Who is the paternal grandfather of Konrad Vi The Dean?
Answer: Konrad II the Gray

Konrad III the Old  (– 28 December 1412) was a Duke of Oleśnica, Koźle, half of Bytom and half of Ścinawa since 1377 (until 1403 with his father as co-ruler). He was the only son of Konrad II the Gray, Duke of Oleśnica, by his wife Agnes, daughter of Casimir I, Duke of Cieszyn.