Philadelphos’s name day is May 10, the feast of Alphaeus, Philadelphus and Cyprinus.
Churches that follow the Old (Julian) Calendar keep the same feast on May 23 of the civil calendar. See everything commemorated on May 10.
The saint behind the name
Alphaeus, Philadelphus and Cyprinus
May 10, Martyr, Αλφειός, Φιλάδελφος και Κυπρίνος
Alphaeus, Philadelphus and Cyprinus were brothers, sons of a nobleman of southern Italy, who were arrested for their faith in the third century and taken through several cities before reaching Leontini in Sicily.
Name days: Alphaios, Alpheios, Philadelphos
Also celebrating on May 10
These names share the feast, many of them other forms of the same name:
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.