Updated June 9, 2019 Share: Boy name origins & meanings German : Eagle and powerful Boy name variations Arnold Arnaud Arnault Arnie Arnald Arne Arnell Arnel Arness Arnot Arnaldo Arnoll Arndt Arnulfo How Popular Is The Name Arno Family name origins & meanings Italian (Arnò) : from the medieval Greek personal name Arnos meaning ‘lamb’.From a reduced form of the Italian personal name Arnao (see Arnold).Dutch and German : from a short form of the personal name Arnout or Arnold.Respelling of French Arnaud.