Alfonso IV, called the Kind was King of Aragon and Count of Barcelona from 1327 to his death. His reign saw the incorporation of the County of Urgell, Duchy of Athens, and Duchy of Neopatria into the Crown of Aragon.
Ferdinand II, was a member of the Castilian cadet branch of the House of Ivrea and King of León and Galicia from 1157 until his death.
Alfonso XI, called the Avenger, was King of Castile and León. He was the son of Ferdinand IV of Castile and his wife Constance of Portugal. Upon his father's death in 1312, several disputes ensued over who would hold regency, which were resolved in 1313.
Alfonso VIII, called the Noble or the one of Las Navas, was King of Castile from 1158 to his death and King of Toledo. After having suffered a great defeat with his own army at Alarcos against the Almohads in 1195, he led the coalition of Christian princes and foreign crusaders who broke the power of the Almohads in the Battle of Las Navas de Tolosa in 1212, an event which marked the arrival of a tide of Christian supremacy on the Iberian peninsula.
Sancho IV of Castile called the Brave, was the king of Castile, León and Galicia from 1284 to his death. Following his brother Ferdinand's death, he gained the support of nobles that declared him king instead of Ferdinand's son Alfonso. Faced with revolts throughout his reign, before he died he made his wife regent for his son Ferdinand IV.
Ferdinand de la Cerda was the heir apparent to the Crown of Castile as the eldest son of Alfonso X and Violant of Aragon. His nickname, de la Cerda, means "of the bristle" in Spanish, a reference to being born with a full head of hair.
Alfonso of León, Lord of Molina was an infante (prince) of León and Castile, the son of King Alfonso IX of León and his second wife Queen Berengaria of Castile. He was the brother of King Ferdinand III of Castile and León, and father of Queen Maria of Molina, wife of King Sancho IV. He became Lord of Molina and Mesa after his first marriage to Mafalda González de Lara, the heiress of those lands.
María Alfonso Téllez de Meneses, known as María de Molina, was queen consort of Castile and León from 1284 to 1295 by marriage to Sancho IV of Castile, and served as regent for her minor son Ferdinand IV and later her grandson Alfonso XI of Castile (1312-1321).
Violant or Violante of Aragon, also known as Yolanda of Aragon, was Queen consort of Castile and León from 1252 to 1284 as the wife of King Alfonso X of Castile.
Alfonso de la Cerda,, called "the Disinherited", was the elder son of Ferdinand de la Cerda and his wife Blanche of France, and was a grandson of Alfonso X of Castile. Alfonso and his brother Fernando were candidates for the Castilian-Leonese crown during the reigns of Sancho IV of Castile, Ferdinand IV of Castile and Alfonso XI of Castile. In 1331, Alfonso renounced his rights and swore allegiance to Alfonso XI of Castile.
The Infantes of Aragon is an appellation commonly used by Spanish historians to refer to a group of 15th-century infantes (princes) of the House of Trastámara, specifically the sons of King Ferdinand I of Aragon and his wife Eleanor of Alburquerque:
Diego López V de Haro, nicknamed el Intruso, was a Spanish noble of the House of Haro and held the title of the Lord of Biscay which he took from the pretender to the title, John of Castile.
Nuño González III de Lara was a Castilian noble of the House of Lara. He was the lord consort of Alegrete, Vide, and Sintra and served as Alférez del rey for King Ferdinand IV of Castile.
Peter of Castile, was an infante of Castile. He was a son of Alfonso X of Castile and Violant of Aragon who was also called Yolanda or Yolante.
Juan Núñez I de Lara y León, also known as "el Gordo" or "the Fat", was a Spanish noble. He was the head of the House of Lara, Lord of Lerma, Amaya, Dueñas, Palenzuela, Tordehumos, Torrelobatón, and la Mota. He was further known as Señor de Albarracín through his first marriage with Teresa Álvarez de Azagra.
The siege of Albarracín was a battle fought during the reign of Peter III of Aragon, King of Aragón from the months of April to September 1284. Albarracín, which had for some time belonged to Juan Núñez I de Lara, the head of the House of Lara, was besieged by an Aragonese force. The siege resulted in the successful taking of the city by Aragonese forces after which, Peter III handed gifted the city to his illegitimate son, Ferdinand of Aragón.
Álvaro Núñez de Lara was a Castilian nobleman, the son of Juan Núñez I de Lara, head of the House of Lara, and his first wife, Teresa Álvarez de Azagra.
The Castilian House of Ivrea, also known as the House of Burgundy, is a cadet branch of the House of Ivrea descended from Raymond of Burgundy. Raymond married Urraca, the eldest legitimate daughter of Alfonso VI of León and Castile of the House of Jiménez. Two years after Raymond's death, Urraca succeeded her father and became queen of Castile and León; Urraca's and Raymond's offspring in the legitimate line ruled the kingdom from 1126 until the death of Peter of Castile in 1369, while their descendants in an illegitimate line, the House of Trastámara, would rule Castile and Aragón into the 16th century.
The House of Guzmán is an old and noble Spanish family that emerged in Castile in the 12th century and became one of the most prominent dynasties of the Spanish kingdom until the 18th century. The original family gave rise to several branches, one of which became Dukes of Medina Sidonia from the 15th century to the 18th century, in turn giving rise to other branches including the Count-Dukes of Olivares.
The House of Quiñones is an old and noble Spanish family that emerged in Castile and León in the 12th century and became one of the most prominent dynasties of the Spanish kingdom until the 20th century. The original family gave rise to several branches, one of which became Conts of Luna from the 15th century to the 19th century, in turn giving rise to other branches including the marquesado de Alcedo.
