John George of Ohlau
He was the second son of George II the Pious , Duke of Brieg-Ohlau-Wohlau ( Brzeg-Oława-Wołów ) , by his wife Barbara , daughter of Joachim II Hector , Elector of Brandenburg . 
<triplet> George II the Pious <subj> Barbara <obj> spouse <triplet> Barbara <subj> George II the Pious <obj> spouse <subj> Joachim II Hector, Elector of Brandenburg <obj> father <triplet> Joachim II Hector, Elector of Brandenburg <subj> Barbara <obj> child