Fernando de la Cerda (1), Infante de Castilla, also called Fernando de Castilla (el de la Cerda), was born in 1255, and married Blanca de Francia, in Burgos, in either 1269, or on October 30, 1268. Blanca was born in 1253, in Jaffa, Palestine. They had two sons, Alfonso, and Fernando de la Cerda.

Fernando, the father, who was the legitimate heir to the throne of Castile and León, died while fighting the Moors, in 1275, in Ciudad Real. His father, Alfonso X, was then still alive so Fernando's older son, Alfonso de la Cerda, became the legitimate heir to the throne. As you will read elsewhere, Alfonso was passed over for the throne in favor of Fernando's brother, Sancho. Blanca died in Paris, between1320 and 1322.
------------------------------------------------------------------------

Children of Infante Fernando de la Cerda and Princesa Blanca de Francia:

i Alfonso de la Cerda (1) [16th great grandfather of Perucho]

ii Fernando de la Cerda (3), Infante de Castilla, was born in either 1272, or 1275, and in 1308, married Juana Nunez de Lara (la Palomilla), Señora de Lara y Herrera. She was born in 1285, the daughter of Juan Nunez de Lara (el Mayor) and Teresa Alvarez de Azagra. They had four children, Juan Nunez de Lara, Blanca de la Cerda, Margarita de la Cerda, and Maria de Lara. Fernando died soon after June 1, 1322, Juana died in 1351 in Palencia.