Aznar Galíndez I was a prominent Basque count who played a significant role in the political landscape of early medieval Spain. Born in the year seven hundred eighty, he became the count of the valley of the River Aragón following the death of Aureolus in eight hundred nine. His authority was likely centered in Jaca, a strategic location within the valley, where he served as a vassal to King Louis the Pious, a son of the famed Emperor Charlemagne.
In eight hundred twenty, Aznar's fortunes took a dramatic turn when he was overthrown by his son-in-law, García the Bad, who was backed by the forces of Íñigo Arista from Navarre. Following this coup, Aznar sought refuge in Vasconia, which remained under Frankish suzerainty. Despite the upheaval, he was appointed count of Urgell and Cerdanya, continuing his legacy in the region.
Aznar's family life was marked by both alliances and tragedies. He had four children, including Matrona, who married García the Bad but was later repudiated after her father's overthrow. His daughter Eilona is mentioned in an eight hundred sixty-two charter, while his son Centullo met a tragic end, murdered by his brother-in-law. His legacy continued through his son Galindo Aznárez I, who would later become Count of Aragon.