Summary from Wikipedia

The son of Henry II, Duke of Bavaria and his wife Gisela of Burgundy, Emperor Henry II was a great-grandson of German King Henry I and a member of the Bavarian branch of the Ottonian dynasty. Since his father had rebelled against two previous emperors, the younger Henry was often in exile. This led him to turn to the Church at an early age, first finding refuge with the Bishop of Freising and later being educated at the cathedral school of Hildesheim. He succeeded his father as Duke of Bavaria in 995 as "Henry IV". As Duke, he attempted to join his second-cousin, Holy Roman Emperor Otto III, i ...