Andronicos’s name day is October 9, the feast of Andronikos and Athanasia.
Churches that follow the Old (Julian) Calendar keep the same feast on October 22 of the civil calendar. See everything commemorated on October 9.
The saint behind the name
Andronikos and Athanasia
October 9, Venerable, Ανδρόνικος και Αθανασία
Andronikos was a goldsmith of Antioch in the fifth century, married to Athanasia; they gave a third of their earnings to the poor and lived in piety. When both of their children died on the same day, they resolved to give themselves wholly to God.
Name days: Andronikos, Andronicus, Andronicos, Athanasia
Also celebrating on October 9
These names share the feast, many of them other forms of the same name:
Andronikos, Andronicus, Athanasia
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.