Yolande of Aragon, Countess of Niebla Illegitimate Daughter of Martin I the Young, King of Sicily (1400–1428) Parents Martin I of Sicily Agatuccia Pesce Children Siblings Martin of Aragon, Heir of Sicily Frederick of Aragon, Count of Luna Peter of Aragon, Heir of Sicily Partners Enrique Pérez de Guzmán, 2nd Count de Niebla