Cornado - Carlos de Viana pretender

Carlos de Viana never ruled Navarre. His father Juan II of Aragón stripped him of the Navarrese succession in favor of his second wife's offspring, triggering a civil conflict that consumed the kingdom for two decades. Carlos struck coins in his own name as Prince of Viana — a title his father refused to honor — asserting a legitimacy that courts across Castile, France, and Catalonia debated while he remained effectively stateless. His imprisonment by Juan II in 1460 provoked a Catalan uprising that outlasted Carlos himself; he died in 1461 before the dispute was ever resolved.