Ecumenius’s name day is May 3, the feast of Oikoumenios of Trikka.
Churches that follow the Old (Julian) Calendar keep the same feast on May 16 of the civil calendar. See everything commemorated on May 3.
The saint behind the name
Oikoumenios of Trikka
May 3, Hierarch, Οικουμένιος
Oikoumenios was bishop of Trikka (modern Trikala) in Thessaly, traditionally placed around the tenth century. He was a learned interpreter of Scripture, and commentaries on the Apocalypse and the Epistles have circulated under his name.
Name days: Oikoumenios, Ecumenius
Also celebrating on May 3
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.