▁it ▁is ▁possible ▁that ▁Tang wy dd ▁obtained ▁Bry che ini og ▁by ▁marriage . ▁ ▁H w gan , ▁Tang wy dd ' s ▁son ▁and ▁successor , ▁attempted ▁to ▁in va de ▁Mer cia , ▁while ▁King ▁Edward ▁the ▁E lder ▁was ▁dist ract ed ▁by ▁the ▁Vik ing ▁invasion ; ▁ ▁H w gan , ▁however , ▁hadn ' t ▁reck oned ▁with ▁Edward ' s ▁sister , ▁ Æ th elf l æ d , ▁who ▁lead ▁an ▁army ▁against ▁him . ▁ Æ th elf l æ d ▁defeated ▁H w gan , ▁in ▁battle , ▁then ▁inv aded ▁his ▁lands , ▁captured ▁H w gan ' s ▁castle ▁( in ▁Bry che ini og ). ▁and ▁took ▁his ▁wife ▁prisoner . ▁H w gan ▁decided ▁to ▁form ▁an ▁al liance ▁with ▁the ▁Vik ings , ▁but ▁died ▁soon ▁after . ▁H w gan ' s ▁son , ▁D ry ff in ▁succeeded ▁him , ▁but ▁E ly stan ▁Gl od ry dd , ▁god - son ▁( and ▁names ake ) ▁of ▁King ▁Ath el stan , ▁conquer ed ▁Fer li x ; ▁D ry ff in ▁and ▁his ▁he irs ▁would ▁now ▁only ▁rule ▁Bry che ini og . ▁▁ ▁E ly stan ▁added ▁Fer li x ▁to ▁his ▁existing ▁real m ▁of ▁Bu ellt . ▁He ▁was ▁succeeded ▁by ▁his ▁son , ▁Cad w gan , ▁who ▁was ▁succeeded ▁by ▁his ▁el dest ▁son , ▁Id ner th ; ▁a ▁younger ▁son ▁gave ▁rise ▁to