5 5 / 6 0 ▁( or ▁earlier ) ▁to ▁around ▁ 1 2 0 0 / 0 5 ▁( or ▁later ), ▁based ▁on ▁the ▁evolution ▁of ▁French ▁ch oral ▁writing ▁during ▁this ▁time ▁( see ▁Works ), ▁in ▁particular , ▁his ▁apparent ▁absence ▁from ▁the ▁flow ering ▁of ▁the ▁French ▁mot et ▁that ▁occurred ▁after ▁ 1 2 1 0 . ▁ ▁P é rot in ▁was ▁one ▁of ▁very ▁few ▁compos ers ▁of ▁his ▁day ▁whose ▁name ▁has ▁been ▁preserved , ▁and ▁can ▁be ▁reli ably ▁attached ▁to ▁individual ▁compos itions , ▁most ▁of ▁which ▁have ▁been ▁trans cribed . ▁An onymous ▁IV ▁called ▁him ▁Mag ister ▁Per ot inus ▁( P é rot inus ▁the ▁Master ). ▁The ▁title , ▁employed ▁also ▁by ▁Johannes ▁de ▁Gar land ia , ▁means ▁that ▁Per ot inus , ▁like ▁Lé on in , ▁earned ▁the ▁degree ▁mag ister ▁art ium , ▁almost ▁certainly ▁in ▁Paris , ▁and ▁that ▁he ▁was ▁lic ensed ▁to ▁teach . ▁However , ▁only ▁An onymous ▁IV ▁employed ▁the ▁super l ative ▁Per ot inus ▁Magn us ▁( Per ot inus ▁the ▁Great ). ▁The ▁name ▁Per ot inus , ▁the ▁Latin ▁dimin utive ▁of ▁Pet rus , ▁is ▁assumed ▁to ▁be ▁derived ▁from ▁the ▁French ▁name ▁P é rot in , ▁dimin utive ▁of ▁Pierre . ▁However ▁" P et rus " ▁was ▁one ▁of ▁the ▁most ▁common ▁names ▁in ▁the ▁I le ▁de ▁France ▁during ▁the ▁High ▁Middle ▁A ges , ▁making ▁further ▁identification ▁difficult .