52%RatingSave Gender Feminine Usage Irish Mythology Meaning & History From Irish muirn meaning either "affection, endearment" or "festivity, exuberance". In Irish legend this was the name of the mother of Fionn mac Cumhaill. She is also called Muirenn. Related NamesFamily Tree·Details Other Languages & CulturesMyrna(English) Murna, Myrna(Irish) Morna(Scottish) Categories feelings, Fire Emblem characters, holidays, isograms, legend, mothers