Atenulf II (died October 1064) was the duke of Gaeta for a brief two years (1062–1064) under the regency of his mother, Maria.
Atenulf al II-lea de Gaeta (d. octombrie 1064) a fost duce de Gaeta pentru o perioadă de doi ani, de la 1062 până la moarte, sub regența mamei sale, Maria.