Sancho III of Navarre
On the death of Sancho III of Navarre in 1035, the Kingdom of Navarre was divided into three parts: (1) Pamplona and its hinterland along with western and coastal Basque districts, (2) Castile, and (3) Sobrarbe, Ribagorza and Aragon. Sancho's son Gonzalo inherited Sobrarbe and Ribargorza, whereas his illegitimate son Ramiro received Aragon, but Gonzalo was killed soon after and all the land he owned went to his brother Ramiro, thus becoming the first de facto king of Aragon, although he never used that title.