Petronilla’s name day is May 31, the feast of Petronilla of Rome.
Churches that follow the Old (Julian) Calendar keep the same feast on June 13 of the civil calendar. See everything commemorated on May 31.
The saint behind the name
Petronilla of Rome
May 31, Holy Woman, Πετρονίλα
Petronilla was a Christian virgin of Rome in the first century, buried in the catacomb of Domitilla, whom tradition calls the daughter of the Apostle Peter, in the sense that she was brought to faith by him. Tradition relates that she refused a pagan suitor and died after fasting and prayer.
Name days: Petronilla
What to say on a name day
The Greek wish is Χρόνια Πολλά (Chronia Polla), “many years.” A call or a short message on the day is what people remember. See name day wishes you can send and what a name day is.