Dinero - Alfonso I Jaca

Alfonso I of Aragon — called "El Batallador," the Battler — issued these billon dineros while simultaneously ruling Pamplona through a dynastic union that proved deeply unstable. His reign was defined by near-constant warfare against the Almoravids, and coin production at Jaca was periodically disrupted by military demands on the treasury. He died in 1134 at the Battle of Fraga, a catastrophic defeat that unraveled the Aragonese-Navarrese union entirely — Navarre immediately broke away and elected its own king.

His childlessness, and the notorious will bequeathing his kingdoms to the military orders of the Temple, Hospital, and Holy Sepulchre, was ultimately ignored by his successors.