▁Er m eng ol ▁X , ▁Count ▁of ▁Ur g ell , ▁died ▁without ▁a ▁male ▁he ir , ▁Gast on ▁claimed ▁the ▁County ▁of ▁Ur g ell , ▁but ▁was ▁no ▁match ▁against ▁King ▁Alfonso ▁IV ▁of ▁Arag on , ▁who ▁incorpor ated ▁Ur g ell ▁into ▁the ▁Crown ▁of ▁Arag on . ▁ ▁On ▁his ▁return ▁from ▁yet ▁another ▁war ▁against ▁Fland ers , ▁Gast on ▁fell ▁ill ▁and ▁died ▁in ▁the ▁Ma ub u isson ▁Ab bey , ▁near ▁P onto ise . ▁His ▁body ▁was ▁transferred ▁to ▁the ▁B oul bon ne ▁Ab bey , ▁where ▁it ▁was ▁buried ▁alongside ▁his ▁ancest ors . ▁Some ▁records ▁state ▁he ▁was ▁buried ▁in ▁the ▁now - dem ol ished ▁church ▁of ▁the ▁Cou vent ▁des ▁Jacob ins ▁in ▁Paris . ▁ ▁Mar riage ▁and ▁children ▁ ▁Gast on ▁married ▁in ▁ 1 3 0 1 ▁Joan ▁of ▁Ar to is ▁( 1 2 8 9 - 1 3 5 0 ), ▁daughter ▁of ▁Philip ▁of ▁Ar to is ▁and ▁Bl anche ▁of ▁Brit t any . ▁They ▁had : ▁▁ ▁Gast on ▁II ▁de ▁Fo ix , ▁Count ▁of ▁Fo ix , ▁Vis count ▁of ▁Bé arn ▁( 1 3 0 8 ▁– ▁ 2 6 ▁September ▁ 1 3 4 3 ). ▁ ▁Roger ▁Bernard ▁IV ▁de ▁Fo ix ▁( 1 3 1 0 ▁– ▁after ▁ 2 4 ▁March ▁ 1 3 5 0 ), ▁married ▁Const anza ▁de ▁L una ▁( 1 3 1 0 ▁– ▁January ▁