▁Guy , ▁marg ra ve ▁of ▁I v rea , ▁who ▁died ▁in ▁the ▁fighting . ▁ ▁Fail ing ▁in ▁his ▁second ▁attempt ▁to ▁reg ain ▁his ▁kingdom , ▁Ad al bert ▁began ▁a ▁long ▁series ▁of ▁negoti ations ▁with ▁the ▁By z antine ▁Empire , ▁which ▁was ▁threatened ▁by ▁Otto ' s ▁designs ▁on ▁southern ▁Italy . ▁When ▁these ▁fell ▁through , ▁he ▁retired ▁with ▁his ▁wife ▁Ger berga ▁to ▁her ▁family ' s ▁est ates ▁in ▁Burg und y . ▁Ad al bert ▁died ▁at ▁Aut un , ▁either ▁on ▁ 3 0 ▁April ▁ 9 7 1 ▁or ▁between ▁ 9 7 2 ▁and ▁ 9 7 5 . ▁From ▁his ▁marriage , ▁contract ed ▁around ▁ 9 5 6 , ▁Ad al bert ▁had ▁one ▁son , ▁Otto - Will iam , ▁who ▁succeeded ▁to ▁the ▁county ▁of ▁M â con ▁through ▁marriage ▁to ▁the ▁wid ow ▁of ▁the ▁previous ▁count . ▁This ▁has ▁led ▁some ▁sch ol ars ▁to ▁mistaken ly ▁conclude ▁that ▁Ger berga ▁must ▁have ▁been ▁related ▁to ▁the ▁counts ▁of ▁M â con . ▁After ▁Ad al bert ' s ▁death , ▁Ger berga ▁married ▁Henry ▁I , ▁Duke ▁of ▁Burg und y . ▁Henry ▁adopted ▁Otto - Will iam ▁and ▁left ▁him ▁the ▁county ▁of ▁Burg und y . ▁Otto - Will iam ▁was ▁even ▁offered ▁the ▁Italian ▁crown ▁after ▁the ▁death ▁of ▁Ar du in ▁in ▁ 1 0 1 5 , ▁although ▁he ▁did ▁not ▁accept . ▁ ▁Six teen ▁diplom as