Afonso married in 1146 Mafalda or Maud of Savoy ( 1125 – 1158 ), daughter of Amadeo III, Count of Savoy, and Mahaut of Albon.

Afonso married Infanta Urraca of Castile, daughter of Alfonso VIIIof Castile and Leonora of England, in 1206.

In 1309, Afonso IV married Infanta Beatrice of Castile, daughter of King Sancho IV of Castile by his wife Maria de Molina.

The first-born of this union, Infanta Maria of Portugal, married King Alfonso XI of Castile in 1328, at the same time that Afonso IV's heir, Peter I of Portugal, was promised to another Castilian infanta, Constance of Peñafiel.

Afonso was first married to his cousin Isabella of Coimbra in 1447.

Isabella died in 1455 and Afonso married again ( although not recognized by the Papacy ) in 1475, this time to Joanna of Castile ( known as " La Beltraneja "), daughter of Henry IV of Castile and Joan of Portugal.

He married and had four children: Pedro Cão, Manuel Cão, André Afonso Cão, and Isabel Cão.

Her firstborn, a daughter named Isabella, married Afonso of Portugal, forging important ties between these two neighboring countries and hopefully ensuring future alliance, but Isabella soon died before giving birth to an heir.

Hostilities between Portugal and the reunited kingdoms of León and Castile were terminated in 1297 by a treaty of alliance, in accordance with which Ferdinand IV of Castile married Constance, daughter of Dinis, while Afonso, son of Denis, married Beatrice of Castile, daughter of Ferdinand.

Peter, the heir, afterwards married Constance, daughter of the duke of Peñafiel ( near Valladolid ), and Afonso IV brought a strong Portuguese army to aid the Castilians against the Moors of Granada and their African allies.

An unwise foreign policy simultaneously injured the royal prestige, for Afonso married his own niece, Joanna, daughter of Henry IV of Castile, and claimed the kingdom in her name.

In 1165 he married Urraca, daughter of Afonso of Portugal.

* Beatrice, married King Afonso III of Portugal.

:# Mafalda ( Mahaut ), ( 1125-1158 ), married Afonso I of Portugal

The oldest daughter, Isabella of Aragon, had been married to Afonso, Prince of Portugal, since childhood.

Fernando married Leonor Telles ( or Teles ) de Menezes, formerly the wife of the late nobleman João Lourenço da Cunha, Lord of Pombeiro, and daughter of Martim Afonso Teles de Menezes.

* Teresa Sánchez, who married Dom João Afonso de Menezes ( died 5 May 1304 ), 1st Conde de Barcelos in Portugal, the first Portuguese hereditary Count, 4th Lord of Alburquerque in Castille and 29th Mordomo-Mór of Portugal, and had female issue, and Rui Gil de Vilalobos, and had female issue

Afonso IV married his daughter, Maria, to Alfonso XI of Castile, but quickly learned that she was being mistreated by her husband.

Feeling as though his daughter was being dishonored, Afonso was glad to enter into an alliance with Juan Manuel and married his son and heir, Peter, to Constance.

In the years to follow, the Queen tried a coup-d ' etat with the help of her family ; Peter, married to an Aragonese whose family fought for Castilian power against the Queen's family, managed to send her back to Castile, appeased older Afonso giving him the Duchy of Braganza and conquered the thrust of his sons by promising them military titles, married his daughter to the young King, and assumed the Regency, establishing himself as the most powerful man in Portugal with the help of his brother Henry.

In the subsequent civil war, Afonso V of Portugal married Juana and invaded Castile ( May 1475 ), defending her rights.

The king had three other children by his long-time mistress, Inês Peres Esteves ; their son Afonso was ten when Philippa and John married.

* Beatrice of Castile, wife of King Afonso III of Portugal

** Beatrice of Castile, wife of King Afonso III of Portugal

King Afonso III of Portugal had to surrender, but he gained an agreement by which, after he consented to marry Alfonso X's daughter Beatrice of Castile, the land would be returned to their heirs.

John I of Castile assumed the title and coat of arms of King of Portugal, which investiture was recognized by the Pope of Avignon, and ordered the deployment of his troops when the Bishop of Guarda and chancellor to Beatrice, Afonso Correia, promised to deliver the support of the people.

He was the third but only surviving son of Afonso IV of Portugal and his wife, princess Beatrice of Castile.

The eldest son of Afonso III of Portugal by his second wife, Beatrice of Castile and grandson of king Alfonso X of Castile ( known as the Wise ), Denis succeeded his father in 1279.

King John I had a first illegitimate son, Afonso, and a daughter Beatrice ; after marrying Philippa of Lancaster, John of Gaunt's daughter, and establishing the House of Aviz, they had a first boy ( died of young age ), a girl Isabella ( who became a famous duchess of Burgundy and Flanders ), then five boys who were grew up under the memories of the famous battle.

She was the first daughter of King Afonso IV of Portugal and his first wife Beatrice of Castile.

Their children were: Hugh I, Duke of Burgundy ( 1057 – 1093 ); Odo I, Duke of Burgundy ( 1058 – 1103 ); Robert, bishop of Langres ( 1059 – 1111 ); Helie, a nun ( b. 1061 ); Beatrice ( b. 1063 ), married Guy I, count of Vignory ; Reginald, abbot of St Pierre ( 1065 – 1092 ); Henry, Count of Portugal ( 1066 – 1112 ), who became a vassal of León and ruler of the county of Portugal in 1093-his son would be Afonso Henriques, first king of Portugal

Infanta Eleanor of Portugal (; ) was a Portuguese infanta ( princess ), the youngest daughter of King Afonso IV of Portugal and his first wife Beatrice of Castile.

Perfidiously, Leonor Teles had her brother John Afonso Telo de Meneses, 6th Count of Barcelos and Alcaide-Mór ( noble magistrate ) of Lisbon, insinuate the idea in the mind of the Infante that his marriage to her daughter, the heiress presumptive Beatrice ( who was promised to John I of Castile ), would find favour with the people and clear his way to the throne.

Infanta Branca of Portugal ( 25 February 1259 – 17 April 1321 ; ), Blanche in English, was a Portuguese infanta ( princess ), eldest daughter of King Afonso III and his second wife Beatrice of Castile.

Infante Afonso of Portugal ( Lisbon, 8 February 1263 – Lisbon, 2 November 1312 ; ; or ) was a Portuguese infante ( prince ), son of King Afonso III of Portugal and his second wife Beatrice of Castile.

Infanta Maria of Portugal ( Coimbra, 21 November 1264 – Coimbra, 6 June 1304 ; ) was a Portuguese infanta ( princess ) daughter of King Afonso III of Portugal and his second wife Beatrice of Castile

Infanta Sancha of Portugal () was a Portuguese infanta ( princess ), daughter of King Afonso III of Portugal and his second wife Beatrice of Castile

Afonso became involved in a war, taking the side of the Aragonese king, an enemy of Castile.

Hitherto, his father Sancho I and his grandfather Afonso I were mostly concerned with military issues either against the neighbouring Kingdom of Castile or against the Moorish lands in the south.

Afonso did not pursue territory enlargement policies and managed to insure peace with Castile during his reign.

He was the second son of King Afonso II of Portugal and his wife, Urraca of Castile ; he succeeded his brother, King Sancho II of Portugal, who was removed from the throne on 4 January 1248.

Since Sancho was not a popular king, the order was not hard to enforce ; he was exiled to Castile and Afonso III became king in 1248 after his brother's death.

Following his success against the Moors, Afonso III had to deal with a political situation arising from the borders with Castile.

Afonso IV was not happy to see his daughter abused, and started a war against Castile.

The last part of Afonso IV's reign is marked not by open warfare against Castile, but by political intrigue.

Worried about his legitimate grandson's life, and the growing power of Castile within Portugal's borders, Afonso ordered the murder of Inês de Castro in 1355.

Her half-aunt, the future Queen Isabella I of Castile, was due to inherit the crown, but Afonso V was keen to interfere with the succession in Castile.

* 1212 – Battle of Las Navas de Tolosa: after Pope Innocent III calls European knights to a crusade, forces of Kings Alfonso VIII of Castile, Sancho VII of Navarre, Peter II of Aragon and Afonso II of Portugal defeat those of the Berber Muslim leader Almohad, thus marking a significant turning point in the Reconquista and in the medieval history of Spain.

* 1267 – King Afonso III of Portugal and King Alfonso X of Castile sign a treaty determining the southern border between Portugal and Spain as the Guadiana River, a border that remains to this day.

* April 25 – Infanta Branca of Portugal, daughter of King Afonso III of Portugal and Urraca of Castile ( d. 1321 )