The Arduinici were a noble Frankish family that immigrated to Italy in the early tenth century, possibly from Neustria.
The first of the Arduinici to enter Italy was Roger, son of Arduin, who was established as count (comes) at Auriate in the early tenth century.
Arduin's grandson, Ulric Manfred (Odalrich-Maginfred), was one of the most powerful noblemen Italy in the 1020s, when he tried to play kingmaker and give the throne to William V of Aquitaine.
Irmgard later married Egbert I, Margrave of Meissen, one of the richest magnates in Germany, and Adelaide, through her marriage to Otto of Savoy, was the mother of Bertha, empress of Henry IV and of another Adelaide, who married the German anti-king Rudolf of Rheinfelden.
Adelaide (died 1091) was the last scion of the house; her heirs were her sons Peter I and Amadeus II of Savoy.