St. Agnes (d. 304) came from a noble Roman family. She was about thirteen when martyred during the reign of the Roman emperor Diocletian. Her name is associated with the Latin “agnus” for “lamb,” as the young saint is often depicted with a lamb by her side. St. Agnes is commemorated in the Roman Canon (Eucharistic Prayer I).
“Almighty ever-living God, who choose what is weak in the world to confound the strong, mercifully grant, that we, who celebrate the heavenly birthday of your Martyr Saint Agnes, may follow her constancy in the faith. Through our Lord Jesus Christ.”
~ from the Proper of Saints, Daily Roman Missal