Duke of Turin and son of King Raginpert, and thus a scion of the Bavarian Dynasty, he was associated with the throne as early as 700.
He defeated Liutpert and the regent Ansprand's men at Pavia and captured the king, whom he later had strangled in his bath.
In 703, Faroald, duke of Spoleto, attacked the Exarchate of Ravenna, but Aripert refused to assist him, for he wanted good relations with papacy and empire.
He nursed friendship with Pope John VI by donating vast tracts of land in the Cottian Alps to the Holy See.
Aripert fled to his capital when the tide went against him, but he hoarded the treasures and tried to cross over into Gaul by night.