yn y dd ▁and ▁U w ch ▁M yn y dd , ▁separated ▁by ▁the ▁chain ▁of ▁hills ▁above ▁Aber ed w . ▁In ▁the ▁late ▁medieval ▁period , ▁it ▁was ▁a ▁march er ▁lord ship . ▁However , ▁after ▁the ▁La ws ▁in ▁Wales ▁Act ▁of ▁ 1 5 3 5 , ▁it ▁was ▁one ▁of ▁the ▁territorial ▁units ▁which ▁went ▁to ▁make ▁up ▁the ▁county ▁of ▁Rad nor shire ▁in ▁ 1 5 3 6 ▁( the ▁others ▁were ▁G wr the yr n ion , ▁Ma el ien y dd ▁and ▁L ly thy fn w g , ▁the ▁latter ▁being ▁known ▁in ▁English ▁as ▁the ▁lord ship ▁of ▁Rad nor ). ▁ ▁Fer li x ▁ ▁Early ▁History ▁ ▁According ▁to ▁historic ▁manuscript s , ▁the ▁region ▁between ▁W ye ▁and ▁Se vern ▁was ▁once ▁regarded ▁as ▁a ▁unit . ▁Man us cript s ▁use ▁various ▁alternative ▁spell ings ▁for ▁this , ▁such ▁as ▁Fer li x , ▁F fer l ly s , ▁F fer leg , ▁and ▁F fer reg ; ▁in ▁his ▁Han es ▁C ym ru , ▁the ▁historian ▁John ▁Dav ies ▁argued , ▁based ▁on ▁these ▁alternatives , ▁that ▁it ▁was ▁probably ▁named ▁F fer yll w g , ▁and ▁that ▁the ▁name ▁may ▁refer ▁to ▁iron work ers ▁( F fer yll ▁in ▁Wel sh ). ▁▁ ▁Wel sh ▁tradition ▁( as ▁reported ▁for ▁example ▁by ▁the ▁ 1 8 4 4 ▁Top ographical ▁Dictionary ▁of ▁Wales ), ▁claims ▁that ▁Fer li x