Eustathios’s name day is February 21, the feast of Eustathios of Antioch.
Churches that follow the Old (Julian) Calendar keep the same feast on March 6 (a day earlier in leap years) of the civil calendar. See everything commemorated on February 21.
The saint behind the name
Eustathios of Antioch
February 21, Hierarch, Ευστάθιος Αντιοχείας
St. Eustathios was born in Side of Pamphylia and became Bishop of Beroea and then Archbishop of Antioch. He took a leading part in the First Ecumenical Council at Nicaea in 325, defending the divinity of Christ against Arius.
Name days: Efstathios, Eustathios, Stathis, Eustathius, Efstathia, Stathoula
Also celebrating on February 21
These names share the feast, many of them other forms of the same name:
Efstathios, Stathis, Eustathius, Efstathia, Stathoula
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.