 An additional claim was that the Navarrese lineage starting with Iñigo Arista (824–851) was an usurpation of the rightful Castilian claimant, the alleged heir to the Visigothic kingdom via the Kingdom of Asturias, the Visigoths being the holders of Roman Emperor Honorius' mandate for Hispania.Lastly, Ferdinand advanced a number of claims to the Navarrese throne related to his marriage to Germaine of Foix, and to his, father John II of Aragon.Ferdinand was informed by spies of the progress of the negotiations between Navarrese diplomats and Louis XII at Blois.