▁Louis ▁the ▁P ious . ▁He ▁is ▁usually ▁thought ▁to ▁have ▁been ▁the ▁first ▁of ▁the ▁line age ▁known ▁to ▁histor ians ▁as ▁the ▁Mat fr id ings ▁( G erman ▁Mat fr iding er ▁or ▁Mat fried e ). ▁ ▁Mat fr id ▁was ▁Count ▁of ▁Or lé ans ▁from ▁around ▁ 8 1 8 . ▁He ▁accompanied ▁the ▁Emperor ▁on ▁his ▁expedition ▁to ▁Brit t any ▁in ▁ 8 2 4 , ▁and ▁served ▁at ▁Louis ' s ▁court . ▁However , ▁in ▁ 8 2 5 , ▁he ▁supported ▁L oth ar , ▁el dest ▁son ▁of ▁Emperor ▁Louis , ▁in ▁his ▁revol t ▁against ▁the ▁Emperor . ▁Rest ored ▁to ▁favour , ▁he ▁led ▁a ▁Frank ish ▁army ▁on ▁the ▁Mar ca ▁His pan ica , ▁the ▁Spanish ▁front ier , ▁in ▁ 8 2 7 , ▁joint ly ▁with ▁his ▁sister ' s ▁husband ▁Hugh , ▁Count ▁of ▁T ours ▁and ▁Louis ' s ▁son ▁Pi pp in , ▁King ▁of ▁Aqu itaine . ▁ ▁Mat fr id , ▁Hugh , ▁and ▁Pi pp in ▁failed ▁to ▁meet ▁the ▁invasion ▁by ▁Ab u ▁Mar wan , ▁and ▁the ▁following ▁year ▁at ▁A achen ▁an ▁Imperial ▁assembly ▁stri pped ▁Mat fr id ▁and ▁Hugh ▁of ▁their ▁titles . ▁There after , ▁although ▁Mat fr id ▁supported ▁the ▁re bell ions ▁of ▁Emperor ▁Louis ' s ▁sons ▁on ▁every ▁occasion , ▁he ▁was ▁repeatedly ▁restored ▁to ▁his ▁lands , ▁title , ▁and ▁imperial ▁favour . ▁▁ ▁Mat fr id ,