In 1078, while his father was besieging Naples with Robert Guiscard, Jordan and Robert, count of Loritello, were ravaging the Abruzzi, then papal territory. He, his father, and the duke were all excommunicated, when, suddenly, his father fell ill, retired to Capua, reconciled with the church, and died.
In 1078, Jordan, along with his father and Robert Guiscard, was engaged in conflict with the Abruzzi, a territory under papal control.  They were excommunicated after their actions. His father fell ill and retired to Capua, reconciled with the church, and died.