ولدت في عهد خالها، هنري الرابع ملك قشتالة ، تم تعريف السنوات الأولى من حياتها التي كتبها التوتر بينه وبين والدتها، كما أن خالها لن يسامح والدتها بزواج من فرديناند دون إذنه.
Born during the reign of her uncle, Henry IV of Castile, the early years of her life were defined by the tension between him and her mother, as her uncle would not forgive her mother for marrying Ferdinand without his permission.