Career
His nickname, de la Cerda, means "of the bristle" in Spanish, a reference to being born with a full head of hair. They had two sons:
Alfonso de la Cerda (1270-1333), who was believed to have married Matilde of Narbonne, daughter of Viscount Aimery VI of Narbonne. Recent research showed that Alfonso de la Cerda married Matilde of Brienne, daughter of John I of Brienne.
Fernando de la Cerda (1275-1322), who married Juana Núñez de Lara, called "la Palomilla", Lady of Lara & Herrera, daughter of Juan Núñez de Lara “el Mayor” and Teresa Álvarez de Azagra.
Ferdinand predeceased his father in 1275 at Ciudad Real from wounds received at the Battle of Écija.