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.

Peace arrived four years later, with the intervention of Infanta Maria herself.

* Infanta Beatríz Isabela Federica Alfonsa Eugenia Cristina Maria Teresa Bienvenida Ladisláa of Spain ( 1909 – 2002 ), who married Don Alessandro Torlonia, 5th Prince di Civitella-Cesi.

* Infanta Maria Cristina Teresa Alejandra Guadalupe Maria de la Concepción Vittoria Eugenia of Spain ( 1911 – 1996 ), who married Enrico Eugenio Marone-Cinzano, 1st Conte Marone-Cinzano.

Archduke Charles of Austria, Duke of Teschen (, also known as Karl von Österreich-Teschen ) ( Full name: Karl Ludwig Johann Josef Lorenz of Austria ) ( 5 September 1771 – 30 April 1847 ) was an Austrian field-marshal, the third son of emperor Leopold II and his wife Infanta Maria Luisa of Spain.

James, who was supportive of Frederick, and had been seeking marriage between the new Prince of Wales and the Spanish Infanta, Maria Anna of Spain, since Prince Henry's death, began to see the Spanish Match as a possible means of achieving peace in Europe.

* September 7 – Infanta Maria of Guimarães ( b. 1538 )

* October 10 – Infanta Maria, Duchess of Viseu ( b. 1521 )

* The Spanish Infanta Maria Theresa brings cocoa to Paris.

* Diego Velázquez's portrait of Infanta Maria Theresa is first exhibited.

* April 6 – Infanta Maria, Marchioness of Tortosa ( d. after 1363 )

Maria was already an adult woman at the time of the marriage, while the Infanta was still a young girl.

Infante | Infanta Mariana Victoria of Spain | Maria Anna Victoria of Spain, to whom Louis was engaged.

In 1721, Louis XV was betrothed to his first cousin, Infanta Maria Anna Victoria of Spain.

Like James, Anne later supported a Catholic match for both their sons, and her correspondence with the potential bride, the Spanish Infanta, Maria Anna, included a request that two friars be sent to Jerusalem to pray for her and the King.

The current royal duchesses are: HRH the Duchess of Badajoz ( Infanta Maria del Pilar ), HRH the Duchess of Soria ( Infanta Margarita ) ( although she inherited the title of Duchess of Hernani from her cousin and is second holder of that title ), HRH the Duchess of Lugo ( Infanta Elena ) and HRH the Duchess of Palma de Mallorca ( Infanta Cristina ).

A daughter of Karl-Theodor, Duke in Bavaria, and his wife, the Infanta Maria Josepha of Portugal, she was born at Possenhofen Castle, Bavaria, Germany, on 25 July 1876, and died on 23 November 1965.

*** Infanta Maria Teresa Rafaela of Spain ( 1726 – 1746 ), first wife of above,

Ties with Spain were reestablished with the marriage of his son Victor Amadeus, Duke of Savoy to the Infanta Maria Antonietta of Spain in 1750.

# Victor Amadeus III of Sardinia ( 1726 – 1796 ); married Infanta Maria Antonietta of Spain and had issue.

He was the second but eldest surviving son of Sancho I of Portugal by his wife, Dulce, Infanta of Aragon.

In 1440 he was elected German king as Frederick IV and in 1452 crowned Holy Roman Emperor as Frederick III by Pope Nicholas V. In 1452, at the age of 37, he married the 18-year-old Infanta Eleanor, daughter of King Edward of Portugal, whose dowry helped him to alleviate his debts and cement his power.

Infanta Benedita of Portugal was also named after him.

* March 31 – Infanta Mariana Victoria of Spain, queen regent of Portugal ( d. 1781 )

* August 15 – Infanta Isabella of Portugal, Queen of Castile and León ( b. 1428 )

** Infanta Sancha of Portugal ( b. 1264 )

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

In Portugal, forks began being used with Infanta Beatrice, Duchess of Viseu, king Manuel I of Portugal's mother.

In 1677, during his mother's regency she tried to arrange a marriage between Victor Amadeus and his first cousin Infanta Isabel Luísa of Portugal, the presumptive heiress of her father, Peter II and Victor Amadeus ' aunt.

Despite a marriage contract being signed between Portugal and Savoy on 15 May 1679, the marriage between Victor Amadeus and the Infanta came to nothing and was thus cancelled.

She held the titles of Infanta of Spain and of Portugal and Archduchess of Austria.

o Venturoso ), King of Portugal and the Algarves ( Alcochete, May 31, 1469 – December 13, 1521 in Lisbon ) was the son of Infante Ferdinand, Duke of Viseu, ( 1433 – 1470 ), by his wife, Infanta Beatrice of Portugal.

The marriage of John's sister, Infanta Isabella of Portugal, to Emperor Charles V enabled the Portuguese king to forge a stronger alliance with Spain and the Holy Roman Empire.

In 1473, he married Leonor of Viseu, Infanta of Portugal and his first cousin.

Of his wife, Leonor of Viseu, Infanta of Portugal John II had two sons, but only one of them survived childhood.

His godfather was the Emperor Franz Joseph I of Austria ( represented by Archduke Franz Ferdinand of Austria ); his godmother was his grandmother Infanta Maria Antonia of Portugal.

Born as the seventeenth child of the dispossessed Robert I, Duke of Parma and his second wife Infanta Maria Antonia of Portugal, Zita married the then Archduke Charles of Austria in 1911.

Duke Robert became a widower in 1882, and two years later he married Infanta Maria Antonia of Portugal, Zita's mother.

* Alexander Farnese ( 27 August 15453 December 1592 ), 3rd Duke of Parma ; married Infanta Maria of Portugal and had issue.

In 1951, Dom Duarte visited Portugal for the first time accompanied by his aunt the Infanta Filipa.