According to Brian Tompsett, UK genealogist: "Suceeded to Aragon upon partition of his father's territories. Count of Ribagorza and Sobrarbe. Died in battle gainst the Muslims. Some sources say killed 8 May 1064 at Graus. See Europaisch Stammtafein Bund II tafel 45." (http://www.dcs.hull.ac.uk/cgi-bin/gedlkup/n=royal?royal07688)