William IV Count of Provence (b. 1100) Parents Gerberga of Burgundy William II of Provence Gerberga of Burgundy Children Siblings Fulk Bertrand of Provence Geoffrey I of Provence Bernard I of Werl Gisela of Swabia Herman II of Werl Rudolf von Werl Herman III of Swabia Matilda of Swabia Beatrix of Swabia