Ku dhammee weedhan soo socda: William wuxuu ahaa wiil uu dhalay Albert I oo reer Bavaria ah iyo Margaret oo reer Brieg ah. William, oo xulufo la ahaa Hooks, ayaa ku jiray
waxa uu ka soo horjeestay aabihiis ilaa sanadkii 1394. Sanadkii 1404 wuxuu ku guulaystay Holland, Hainaut iyo Zeeland iyo duke of Bavaria-Straubing.