Boyhood name in classical Irish for Fionn mac Cumhaill; Deimne Maol is the ModIr. variant; Domhnach, Deima, etc., appear in oral tradition. Demne implies assurance or firmness and stability. Máel denotes short hair, and associations with druidism and the Otherworld.
See J. F. Nagy, ‘Demna Mael’, Celtica, 14 (1981), 8–14, on the significance of this name; also J. F. Nagy, The Wisdom of the Outlaw (Berkeley, Calif., 1985).