He was the eldest son of Aimery I of Narbonne and Mahalt (also Mahault or Mafalda), daughter of Robert Guiscard and Sichelgaita and widow of Raymond Berengar II of Barcelona.
Probably in 1112 or 1113, Aimery received the Fenouillèdes and the Peyrepertusès from his half-brother in return for swearing an oath of fealty against Bernard Ato IV of Béziers, with whom Raymond Berengar was at war.
In 1114, Aimery put an end to conflicting claims in the village of Le Lac on the Via Domitia by transferring his rights there to the abbey of Lagrasse in return for a large loan of gold and silver.
[3] He also entered into a conflict with his cousin Richard de Millau, Archbishop of Narbonne, who may have been a compromise candidate between Aimery and the pope for the archiepiscopal throne.
[6] Richard claimed that Aimery fecit mihi hominium propriis manibus ("did homage to [him] with his own hands") received fedovia ("fiefs") from the Church "in the presence of the universal synod of the province of Narbonne.