Nearhos’s name day is April 22, the feast of Nearchos the Martyr.
Churches that follow the Old (Julian) Calendar keep the same feast on May 5 of the civil calendar. See everything commemorated on April 22.
The saint behind the name
Nearchos the Martyr
April 22, Martyr, Νέαρχος
Nearchos was a soldier at Melitene in Armenia and the close friend of Polyeuctus, whom he brought to faith in Christ before Polyeuctus's own martyrdom. He later confessed the faith himself.
Also celebrating on April 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.