A Germanic name, from Middle English Walter, from Old Northern French Waltier, from Frankish *Waltheri (compare Old High German Waltheri, which see for more details), from Proto-West Germanic *Waldahari, from Proto-Germanic *Waldaharjaz, from *waldą (“ruler”) + *harjaz (“army, host”). Related to Old English Waldhere. Compare herald and Harold, in which these elements are reversed.