Atenulf II was the duke of Gaeta for a brief two years (1062–1064) under the regency

Regent

A regent, from the Latin regens "one who reigns", is a person selected to act as head of state because the ruler is a minor, not present, or debilitated. Currently there are only two ruling Regencies in the world, sovereign Liechtenstein and the Malaysian constitutive state of Terengganu...

 of his mother, Maria

Maria of Gaeta

Maria , daughter of Pandulf IV of Capua and Maria, was the wife of Atenulf, count of Aquino, while her unnamed sister was the wife of Atenulf's brother Lando...

. He was the son and successor of Atenulf I

Atenulf I of Gaeta

Atenulf I was the Lombard count of Aquino who rose to become Duke of Gaeta in Southern Italy during the chaotic middle of the eleventh century....

, who had been forced to recognise the suzerainty of the prince of Capua, Richard I

Richard I of Capua

Richard I Drengot was a count of Aversa and prince of Capua .He was the son of Asclettin, count of Acerenza, younger brother of Asclettin, count of Aversa, and nephew of Rainulf Drengot, the Norman adventurer who had first travelled to southern Italy in 1017 and progressed to set up the first...

, and his son Jordan

Jordan I of Capua

Jordan I , count of Aversa and prince of Capua from 1078 to his death, was the eldest son and successor of Prince Richard I of Capua and Fressenda, a daughter of Tancred of Hauteville and his second wife, also named Fressenda, and the nephew of Robert Guiscard, duke of Apulia, Calabria, and Sicily...

 in 1058.

Atenulf I died on 2 February and on 1 June, Maria had confirmed a year-long treaty with several neighbouring counties against the dominance of the Normans

Normans

The Normans were the people who gave their name to Normandy, a region in northern France. They were descended from Norse Viking conquerors of the territory and the native population of Frankish and Gallo-Roman stock...

 of Aversa and Capua

Principality of Capua

The Principality of Capua was a Lombard state in Southern Italy, usually de facto independent, but under the varying suzerainty of Western and Eastern Roman Empires. It was originally a gastaldate, then a county, within the principality of Salerno....

. During March of the year of peace, Atenulf II remained at Gaeta and on 28 June 1063, Gaeta was captured by Jordan and became a city of the prince of Capua. Atenulf was allowed to maintain possession until the next year, when his mother's new husband, William of Montreuil

William of Montreuil

William of Montreuil was an Italo-Norman freebooter of the mid-eleventh century. He was described by Amatus of Monte Cassino as an exceptional knight, small in stature, who was very robust, strong, valiant and by Orderic Vitalis as le Bon Normand, "the Good Norman."He was a son of the Guillaume...

, was installed as duke.

Sources

• Norwich, John Julius
  John Julius Norwich
  John Julius Cooper, 2nd Viscount Norwich CVO — known as John Julius Norwich — is an English historian, travel writer and television personality.-Early life:...
  
  . The Normans in the South 1016-1130. Longmans: London
  London
  London is the capital city of :England and the :United Kingdom, the largest metropolitan area in the United Kingdom, and the largest urban zone in the European Union by most measures. Located on the River Thames, London has been a major settlement for two millennia, its history going back to its...
  
  , 1967.
• Chalandon, Ferdinand. Histoire de la domination normande en Italie et en Sicilie. Paris
  Paris
  Paris is the capital and largest city in France, situated on the river Seine, in northern France, at the heart of the Île-de-France region...
  
  , 1907.