Gender masculine Ιλαρίωνας is a modern form of Greek name Ιλαρίων.Feasts and saints related to given name Ιλαρίωνας St Hilarion, higoumène du monastère de Dalmate Feast day June 6 When is Ιλαρίωνας's name day? Ιλαρίωνας's Day is celebrated on June 6 in memory of St Hilarion. Transcriptions Ilarionas(la) Log in or register to post comments Be the first to rate this name Leave this field blank