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 Copied to clipboard