Sancho I of Pamplona

[3] Around the time of the death of King García Íñiguez he ruled the Onsella valley in the western part of the kingdom.

He managed to take control of the city of Pamplona while Fortún Garcés was still king, aided by Alfonso III of Asturias and the Count of Pallars.

Four years later, another former ally, Galindo Aznárez, joined with his brother-in-law Muhammad al-Tawil and Abd Allah ibn Lubb al-Qasawi to attack Sancho, but they were defeated and neutralized as a threat.

Al-Tawil fled and was killed shortly afterward, and the power of the Banu Qasi was severely crippled, while Galindo was forced into vassalage to Sancho, leading to the incorporation of the County of Aragon into the Pamplona kingdom.

Two years later Sancho teamed with Bernard I of Ribagorza and Amrus ibn Muhammed, son of Muhammad al-Tawil, to attack Banu Qasi-held Monzón.