Alfonso VI of León and Castile
Teresa was the illegitimate daughter of King Alfonso VI of León and Castile by Jimena Muñoz. In 1093, her father married her to a French nobleman, Henry of Burgundy, nephew of Queen Constance, a brother of the Duke of Burgundy, a descendant of the kings of France in the male line. Henry was providing military assistance to his father-in-law against the Muslims on the Portuguese march.