▁following ▁the ▁death ▁of ▁her ▁infant ▁first ▁cousin ▁King ▁John ▁I . ▁ ▁Count ess ▁cons ort ▁of ▁Fland ers ▁Margaret ▁married ▁Louis ▁I , ▁Count ▁of ▁Fland ers . ▁Her ▁husband ▁was ▁dependent ▁on ▁her ▁father ▁in ▁suppress ing ▁the ▁re bell ion ▁of ▁Nicola as ▁Z an nek in . ▁King ▁Philip ▁died ▁in ▁ 1 3 2 2 , ▁and ▁the ▁crown ▁was ▁inherited ▁by ▁her ▁uncle , ▁King ▁Charles ▁IV . ▁ ▁Margaret ' s ▁mother , ▁Joan ▁II , ▁succeeded ▁her ▁own ▁mother , ▁Mah aut , ▁as ▁Count ess ▁of ▁Ar to is ▁in ▁ 1 3 2 9 . ▁Margaret ' s ▁elder ▁sister ▁Joan , ▁inherited ▁the ▁count ies ▁of ▁Ar to is ▁and ▁Burg und y ▁when ▁their ▁mother ▁died ▁in ▁ 1 3 3 0 . ▁ ▁Reg ency ▁of ▁Fland ers ▁Her ▁husband ▁was ▁killed ▁in ▁the ▁Battle ▁of ▁C ré cy ▁on ▁ 2 6 ▁August ▁ 1 3 4 6 . ▁He ▁and ▁Margaret ▁had ▁one ▁son , ▁Louis ▁II , ▁Count ▁of ▁Fland ers , ▁who ▁succeeded ▁his ▁father ▁and ▁for ▁whom ▁she ▁acted ▁as ▁a ▁reg ent ▁in ▁the ▁beginning ▁of ▁his ▁reign . ▁In ▁ 1 3 5 5 , ▁her ▁son ▁Louis ▁claimed ▁the ▁Duch y ▁of ▁B rab ant ▁in ▁right ▁of ▁his ▁wife , ▁but ▁Duch ess ▁Jo anna ▁managed ▁to ▁keep ▁her ▁poss essions . ▁ ▁Count ess ▁of ▁Burg und y ▁In ▁ 1 3 5 7 , ▁Margaret ' s ▁grand