Real - Juan de Gante pretender

John of Gaunt's claim to the Castilian throne derived entirely from his marriage to Constance, daughter of Pedro I — the king murdered by his own half-brother Enrique de Trastámara in 1369. These coins were struck in support of that claim during the years Gaunt actively pressed it, largely financed by English Crown backing and minted in territories under his influence rather than from Castilian mints proper. The pretension ultimately collapsed without battle: in 1388, Gaunt renounced his claim under the Treaty of Bayonne in exchange for a substantial cash settlement and the marriage of his daughter Catherine to the future Enrique III.