Juan Manuel, Prince of Villena
In 1303, while the King was in Badajoz, Henry of Castile, Diego López V de Haro and Juan Manuel, Prince of Villena had a meeting in Roa, and they agreed that Juan Manuel would have a meeting with the King of Aragon, who agreed that the three magnates and himself should meet the Day of John the Baptist in the municipality of Ariza. Later, Henry of Castile communicated his plans to María de Molina, who was in Valladolid, with the purpose of that she was united to them. The plan of Henry of Castile consisted in that Alfonso de la Cerda became King of León and married with the "Infanta" Isabel (sister of Ferdinand IV and repudiated child-bride of the Aragonese monarch), while the "Infante" Peter of Castile (brother of Fernando IV) would be proclaimed King of Castile and would marry with a daughter of James II of Aragon. Henry of Castile stated that his intention was to achieve peace in the Kingdom and to eliminate the influence of the John of Castile and Juan Núñez II de Lara.