Ramiro I
When his siblings assassinated King Sancho IV of Navarre in 1076, they colluded with the bishops of Bayonne. The kings of Navarre were Ramiro I of Aragon and Navarre (Sancho III of Navarre's son, died 1065) and his successor Sancho Ramirez, known as Sancho V of Navarre and Aragon. These Navarrese-Aragonese kings ruled the thinly-populated Aragon with less military strength than Alfonso VI of Castile (1040–1109), a nephew of Ramiro I of Aragon.