Syllabification Γιάν-νος Gender masculine Γιάννος is a variant of Greek name Γιάννης. Synaxis of Prophet Forerunner and Baptist John Feast day January 7 When is Γιάννος's name day? Γιάννος's Day is celebrated on January 7 in memory of Synaxis of Prophet Forerunner and Baptist John. Transcriptions Yannos (la) Log in or register to post comments Be the first to rate this name Leave this field blank