When King Sancho's territories were divided between his sons after he died, Aragon was elevated into a kingdom and awarded to Sancho's illegitimate son Ramiro, while the neighbouring counties of Sobrarbe and Ribagorza to the east of Aragon formed the fleeting kingdom which was granted to Ramiro's half-brother Gonzalo.
Subscription lists of charters dated to the early years of the Aragonese kingdom appear not to refer to seoros which lay outside the area of the original county, which suggests that the kingdom was not territorially more significant than its predecessor.
Count Ramn Berenguer became effective ruler of Aragon from 1137, initiating a period of nearly four centuries during which the kingdom of Aragon and the Catalonian counties to the west were united in a loose federal state which became a major political force throughout the Mediterranean basin and whose history is well known. Ubieto Arteta dates this charter to [808/21], his most telling argument being that the document lists donations (23 in total) none of which are recorded in later charters which are included in the cartulary of Siresa.
In about , the Aragonese heiress Andregoto married Garca III King of Navarre.
The couples descendants ruled both as kings of Navarre and counts of Aragon until the death of Sancho III "el Mayor" King of Navarre in 1035.
By the early 10th century, no further references to the French kings are found in Aragonese charters which refer exclusively to the reigns of the kings of Pamplona/Navarre who by that time presumably enjoyed suzerainty over the county of Aragon.
The main religious centre of Aragon was the Benedictine monastery of San Pedro de Siresa, founded in the early ninth century, although the monastery of San Juan de la Pea became the most important Aragonese religious institution in the tenth century, a series of texts probably written shortly before 992 almost certainly in Navarre.
This suggestion is corroborated by the dating clauses of the earliest Aragonese charters referring to the regnal years of the Carolingian kings/emperors.