Borrowed from French cryptonyme. By surface analysis, cripto- + -onim. criptonim n (plural <span class="searchmatch">criptonimi</span>) cryptonym...
Italian Wikipedia has an article on: criptonimo Wikipedia it From cripto- + -onimo. criptonimo m (plural <span class="searchmatch">criptonimi</span>) cryptonym Synonym: nome in codice...