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House of Trastámara

house of trastamara, house of trastamara family tree
The House of Trastámara was a dynasty of kings in Spain , which first governed in Castile beginning in 1369 before expanding its rule into Aragón, Navarre and Naples They were an illegitimate cadet line of the House of Ivrea

The line of Trastámaran royalty in Castile ruled throughout a period of military struggle with Aragon Their family was sustained with large amounts of inbreeding, which led to a series of disputed struggles over rightful claims to the Castilian throne This lineage ultimately ruled in Castile from the rise to power of Henry II in 1369 through the unification of the crowns under Ferdinand and Isabella


  • 1 14th century: toward unification with Aragon
    • 11 Peter I and the Rise of Trastámara
    • 12 Reign of Henry II
  • 2 The Trastámaras rule in several realms
  • 3 1418–69: Conflict within the House of Trastámara
    • 31 John II and Don Álvaro
    • 32 Henry IV and the rise of Isabella I
    • 33 Pact of the Toros de Guisando and War of Succession
  • 4 Family tree
  • 5 See also
  • 6 References

14th century: toward unification with Aragonedit

Peter I and the Rise of Trastámaraedit

Upon the death of the Castilian King Alfonso XI in 1350, his eldest son, Peter, took control of the Castilian throne as Peter I of Castile Peter was born to Alfonso and his wife, Maria of Portugal, but Alfonso lived out a long and public affair with Eleanor of Guzman Alfonso's illegitimate children by Eleanor, known collectively as the Trastámaras, immediately became rivals of the newly crowned Peter1 Because of a personal history including political murders, his enemies quickly nicknamed him Peter the Cruel1 Also increasing the hostilities between Peter and his half brothers was the act of Peter's mother taking the opportunity of his power to have Eleanor of Guzman arrested and executed2

Peter first resisted an attempt at his crown by defeating a coalition led by Henry of Trastámara for whom Peter's half siblings derived their surname in 1356 Peter again defeated his rivals at Nájera in 1360 and had his half brothers Juan and Pedro executed Having been protected by Aragon,1 Henry was forced to flee to France when the Castilian crown signed a peace treaty with Aragon in 1360

Henry supervising the beheading of his rival Peter, from the Grandes Chroniques de France

Gaining support throughout Castile because of his relation to Alfonso XI and Peter's continuous military escapades, Henry built an alliance with Aragon and France, including mercenaries led by French constable Bertram Du Guesclin for another attempt at the Castilian crown in 13651 Peter gained the support of Edward, the Black Prince, heir to the English throne and son of Edward III of England, to help defend his crown with the promise of territorial gains On 13 April 1367, Peter and Edward's forces strongly defeated the armies of Francs, Aragonese, and Castilians led by Henry and captured Bertram Du Guesclin As Edward fell ill, and sick with Peter's attempts to get Edward's prisoners executed, and perhaps with Peter's delay or failure to fulfill his promises of land to England, the Plantagenets withdrew from their direct battlefield support of the Castilian Crown to the new front in Gascony opened to the French In March 1369, with the continued support of France and Aragon, and growing support in important cities in parts of Castile, Henry's forces again invaded the Castilian Crown's realm and checked Peter's army1 Henry of Trastámara himself was responsible for the death of his brother, Peter I of Castile

Reign of Henry IIedit

Following his killing of his half brother, Peter I, Henry of Trastámara took control of the crown of Castile as Henry II Under Henry, a new nobility rose in prominence to gain land grants of large estates and vast royal privileges The public rise of this new class of nobles caused discontent and instability in Castile This class of nobility was driven by their desire to reclaim family holdings and was generally compelled to use any means necessary3 Despite the instability, Henry's forces were able to withstand Portuguese, Navarrese, and Granadian attempts to invade and take control of Castile1

Henry made an agreement with the ruler of Aragon, Peter IV, to have their children wed Henry's son, John, was married to Peter IV's daughter, Eleanor, on 18 June 13751 This marriage by Henry's son would eventually put the Trastámaras in control of both Castile and Aragon, comprising a majority of the Iberian Peninsula After giving birth to three children, Eleanor died in 1382, after only seven years of marriage

The Trastámaras rule in several realmsedit

Upon Henry II's death in 1379, his son John came to power as John I of Castile During his reign, John took Beatrice, daughter of King Ferdinand I of Portugal, as his second wife On the basis of this marriage, John made an unsuccessful claim to the throne of Portugal upon Ferdinand I's death in 1383, a move that possibly could have led to the unification of all of the Iberian Peninsula1 John died very unexpectedly in 1390

Upon his untimely death, John's eldest son Henry came to the throne as Henry III, at the very young age of twelve years He waited only two years to independently take control of the throne in 1393 at only fourteen years of age, amidst a great deal of violence being carried out against Jews throughout Castile1 Among the young king's accomplishments was his taking of control of the Canary Islands, providing Castile with a holding in the Atlantic Ocean In 1406, amidst an invasion by Granada's forces in Murcia, Henry died while planning a response at the age of 27

John II, Henry III's son, was left as the only heir upon Henry's death in 1406, but he was only two years old Henry's brother, Ferdinand, served as regent, along with John's mother, Catherine of Lancaster

During his time as regent, Ferdinand was chosen as the ruler of Aragon, due to his maternal relation to the Aragonese throne through the Compromise of Caspe in 14121 The Trastámaras now ruled in both the realms of Castile and Aragon

1418–69: Conflict within the House of Trastámaraedit

John II and Don Álvaroedit

Statue of Álvaro de Luna in Cañete

John II came to power upon his mother's death in 1418 He was now a cousin to the King of Aragon, as Alfonso ascended to the throne upon Ferdinand I's death John married Maria, the sister of Alfonso V of Aragon Alfonso himself had already married John's sister, Maria, making the two rulers both cousins and brothers-in-law twice over John II was now also a cousin and brother-in-law to Alfonso's brothers John and Henry, known collectively as the Infantes of Aragon, who had been given large amounts of land in Castile while their father worked as regent during John II's childhood1

John II lacked widespread authority, and Castile became a battlefield for nobles to gain power and political influence1 In 1420, just two years after coming to power, John was kidnapped by his cousin Infante Henry Henry ruled on John's behalf for much of the year until John was able to escape because of the help of his friend, and eventual royal favorite, Álvaro de Luna, who was known as Don Alvaro4

In 1429, Alfonso V ordered the Infantes to lead a joint attack on Castile Now John II's constable, Don Alvaro, agreed to a basically victorious truce, as the Aragonese branch of Trastámaras was removed from Castile4 John II's authority continued to decline following this military engagement, and he eventually ceded all power to Don Alvaro, who created an oligarchy of nobles Don Alvaro lost this power in 1439 to a nobility which was allied with Alfonso V, and in 1443, John II was once again captured by Infante John of Aragon, throwing Castile into near anarchy1 This confusion was settled in 1445, when a group of nobles favoring the monarchy, led by Don Alvaro, won a battle at Olmedo4 Infante Henry was killed as a result of this battle

In 1453, Don Álvaro was publicly beheaded for charges of tyranny In July of the following year, John II died and his son Henry became King Henry IV of Castile

Henry IV and the rise of Isabella Iedit

Henry IV of Castile was an unpopular ruler, in part because of his taste for Moorish fashion and his disagreement with military engagement with Granada1 He was married at the age of 15 in 1440 to John II of Aragon's daughter, Blanche John II had succeeded to the throne of Aragon upon the death of his brother Alfonso V of Aragon This marriage failed, however, as a result of Henry's inability to consummate it He was remarried in 1455 to Joan of Portugal Queen Joan gave birth to Princess Joan in 1462, and she was recognized by the Cortes as Henry's legitimate successor In 1464, charges were raised by powerful noble families that Princess Joan was the daughter of one of Henry's favorites, Beltran de la Cueva

These powerful noble families eventually forced Henry IV to hand over power to his brother Alfonso in 1465, but Alfonso suddenly died a month later Amidst the struggle to settle the ensuing claims to the throne, Henry's wife Joan became pregnant again while being held as a hostage of a noble family This sign of misbehavior further weakened her daughter Princess Joan's claim to the throne, and paved the way for Henry's half-sister Isabella to take power1

Pact of the Toros de Guisando and War of Successionedit

The Pact of the Toros de Guisando was signed in 1468 and named Isabella heir to Henry's throne, as she and the nobles renewed their allegiance to Henry in return A quick marriage for Isabella was a condition of the agreement, however Henry objected to her 1469 marriage to Ferdinand, who was the King of Sicily and the heir to the Aragonese throne,5 as a breach of the pact He once again named his daughter Joan as his heir, and a civil war ensued throughout the next decade Isabella's military factions were eventually victorious with the help of Aragon, making her queen and uniting the crowns of Aragon and Castile

Family treeedit

See alsoedit

  • List of Navarrese monarchs from the House of Trastámara
  • Navarre monarchs family tree


  1. ^ a b c d e f g h i j k l m n o Reilly, Bernard 1993 The Medieval Spain Cambridge: Cambridge University Press ISBN 0-521-39436-8 
  2. ^ Ruiz, Teofilo 2007 Spain's Centuries of Crisis: 1300-1474 Malden, MA: Blackwell Publishing ISBN 978-1-4051-2789-9 
  3. ^ Prescott, William 1842 History of Ferdinand and Isabella London: Richard Bentley pp 22–23 
  4. ^ a b c Jaen, Didier 1978 John II of Castile and the Grand Master Alvaro de Luna: A Biography Madrid: Castalia Publishing 
  5. ^ Elliot, JH 1963 Imperial Spain: 1469–1716 New York: Penguin Books p 15 ISBN 978-0-14-100703-8 

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