Pia Fidelis
Pia Fidelis, Latin feminine form for "pious and faithful", was the cognomen of several Roman legions, awarded by an emperor when the legion had proved "devoted and loyal". Some legions received this honour several times, and their name included the number of awards. Awards were made from 42 AD until the end of the second century AD. It was awarded in total to 10 legions and around 50 auxilia cohorts.