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Atenulf II (died October 1064) was the duke of Gaeta for a brief two years (1062–1064) under the regency of his mother, Maria.
Electing their own civil government, they expelled Geoffrey, who continued to rule the country side as duke from his castle at Pontecorvo.
William II, called de Blosseville, was the consul and duke of Gaeta from 1103 to 1105.