Agathonikis’s name day is August 22, the feast of Agathonikos of Nicomedia.
Churches that follow the Old (Julian) Calendar keep the same feast on September 4 of the civil calendar. See everything commemorated on August 22.
The saint behind the name
Agathonikos of Nicomedia
August 22, Martyr, Αγαθόνικος
St. Agathonikos was a Christian of noble birth in Nicomedia who lived in the time of the Emperor Maximian. Zealous for the faith, he brought many pagans to Christ, for which he was seized by the governor, tortured, and taken in chains along the road toward Byzantium together with other confessors.
Name days: Agathonikos, Agathonikis, Agathoniki
Also celebrating on August 22
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.