Ferdinand I of Portugal

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Portuguese Royalty
House of Burgundy

Afonso Henriques (Afonso I)
Children include Infanta Urraca, Queen of Léon Infante Sancho (future Sancho I) Infanta Teresa, Countess of Flanders
Sancho I
Children include Infanta Teresa, Queen of Castile Infanta Sancha Infanta Constança Infante Afonso (future Afonso II) Infante Pedro, Count of Urgell Infante Fernando, Count of Flanders Infanta Branca, Lady of Guadalajara Infanta Berengária, Queen of Denmark Infanta Mafalda, Queen of Castile
Afonso II
Children include Infante Sancho (future Sancho II) Infante Afonso, Count of Boulogne (future Afonso III) Infanta Leonor, Queen of Denmark Infante Fernando, Lord of Serpa
Sancho II
Afonso III
Children include Infanta Branca Infante Dinis (future Denis I) Infante Afonso, Lord of Portalegre Infanta Maria Infanta Sancha
Denis
Children include Infanta Constança, Queen of Castile Infante Afonso (future Afonso IV)
Afonso IV
Children include Infanta Maria, Queen of Castile Infante Pedro (future Peter I) Infanta Leonor, Queen of Aragon
Peter I
Children include Infanta Maria, Marchioness of Tortosa Infante Fernando (future Ferdinand I) Infanta Beatriz, Countess of Alburquerque Infante João, Duke of Valencia de Campos Infante Dinis, Lord of Cifuentes John, Grand Master of the Order of Aviz (future John I) (natural son)
Ferdinand I
Children include Infanta Beatrice, Queen of Castile and Leon (future Beatrice I of Portugal)
Beatrice (disputed queen)
Children include Miguel of Trastámara

Fernando I, King of Portugal (pron. IPA [fɨɾ'nɐ̃du]), ninth king of Portugal and Algarve (Eng. Ferdinand I), sometimes referred to as the Handsome (Port. o Formoso) or rarely as the Inconstant (Port. o Inconstante) (Lisbon, October 31, 1345 – October 22, 1383 in Lisbon) was the second but eldest surviving son of Pedro I of Portugal (who should not to be confused with his Castilian contemporary Pedro of Castile) and his wife, princess Constance of Castile. He succeeded his father in 1367.

Fernando I of Portugal

On the death of Pedro of Castile in 1369, Ferdinand, as great grandson of Sancho IV by the female line, laid claim to the vacant throne, for which the kings of Aragon and Navarre, and afterwards John of Gaunt, duke of Lancaster (married in 1370 to Constance, the eldest daughter of Pedro), also became competitors.

Meanwhile Henry of Trastamara, the brother (illegitimate) and conqueror of Pedro, had assumed the crown and taken the field. After one or two indecisive campaigns, all parties were ready to accept the mediation of Pope Gregory XI. The conditions of the treaty, ratified in 1371, included a marriage between Ferdinand and Leonora of Castile. But before the union could take place the former had become passionately attached to Leonor Telles de Menezes, the wife of one of his own courtiers, and having procured a dissolution of her previous marriage, he lost no time in making her his queen.

This strange conduct, although it raised a serious insurrection in Portugal, did not at once result in a war with Henry; but the outward concord was soon disturbed by the intrigues of the duke of Lancaster, who prevailed on Ferdinand to enter into a secret treaty for the expulsion of Henry from his throne. The war which followed was unsuccessful; and peace was again made in 1373. On the death of Henry in 1379, the duke of Lancaster once more put forward his claims, and again found an ally in Portugal; but, according to the Continental annalists, the English proved as offensive to their companions in arms as to their enemies in the field; and Ferdinand made a peace for himself at Badajoz in 1382, its being stipulated that Beatrice, the heiress of Ferdinand, should marry King John I of Castile, and thus secure the ultimate union of the crowns.

Ferdinand left no male heir when he died on October 22 1383, and the direct Burgundian line, which had been in possession of the throne since the days of Count Henry (about 1112), became extinct. The stipulations of the treaty of Badajoz were set aside, and João, grand-master of the order of Aviz, Ferdinand's illegitimate brother, claimed the throne. This led to a period of war and political indefinition known as the 1383-1385 Crisis. João became the first king of the House of Aviz in 1385.

[edit] Ancestors

**Ferdinand's ancestors in three generations**
Ferdinand I of Portugal	Father: Peter I of Portugal	Father's father: Afonso IV of Portugal	Father's father's father: Denis of Portugal
			Father's father's mother: Elizabeth of Aragon
		Father's mother: Beatrice of Castile	Father's mother's father: Sancho IV of Castile
			Father's mother's mother: Maria de Molina
	Mother: Constance of Peñafiel	Mother's father: Juan Manuel, Duke of Peñafiel	Mother's father's father: Juan Manuel, Lord of Villena
			Mother's father's mother: Beatrice of Savoy
		Mother's mother: Constance of Aragon	Mother's mother's father: James II of Aragon
			Mother's mother's mother: Blanche of Anjou

[edit] Marriages and descendants

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 Martin Alfonso Telles de Menezes (Martim Afonso Teles de Menezes). She gave him two son who both died young, and one daguter.

Name	Birth	Death	Notes
By Leonor Telles de Menezes (c. 1340-April 27, 1386; married in 1371)
Beatrice, Queen of Portugal	1372	c. 1410	Heiress of her father. Married King John (Juan) I of Castile and list the throne of Portugal during the 1383-1385 crisis.
Prince Peter	1370 or 1380	1370 or 1380
Prince Afonso	1371 or 1382	1371 or 1382
Illegitimate offspring
Isabel	1364	1395	Countess of Gijón and Noreña through marriage to Alfonso, Count of Gijón and Noreña, illegitimate son of Henry II of Castile.