Arnold I of Astarac

Arnold I, also called Arnaud-Garcia and nicknamed Nonnat, was the first Count of Astarac. The youngest son of Duke García II Sánchez of Gascony, he received Astarac when his father's duchy was divided around 920, while his brothers took Gascony and Fézensac.

His county lay between Fézensac and Bigorre and included Pardiac and Magnoac. He is attested in charters as count from 920 to 952 and was dead by 960, when his son Garcia Arnaud succeeded him.