Paternal Family Tree: Ivrea
Maternal Family Tree: Inês Castro 1325-1355
In 1394 [her father] Ferdinand I King Aragon [aged 13] and [her mother] Eleanor of Alberquerque Queen Consort Aragon [aged 20] were married. She by marriage Queen Consort Aragon. He the son of [her grandfather] John I King Castile and [her grandmother] Eleanor Barcelona Queen Consort Castile. They were first cousin once removed.
In 1396 Maria Trastámara Queen Consort Castile was born to Ferdinand I King Aragon [aged 15] and Eleanor of Alberquerque Queen Consort Aragon [aged 22]. Coefficient of inbreeding 4.42%.
On 25th December 1406 [her uncle] Henry III King Castile [aged 27] died. His son [her future husband] John [aged 1] succeeded II King Castile.
On 31st May 1410 King Martin I of Aragon [aged 53] died. His nephew [her father] Ferdinand [aged 29] succeeded I King Aragon.
On 12th June 1415 [her brother] Alfonso V King Aragon [aged 19] and [her sister-in-law] Maria Trastámara Queen Consort Aragon [aged 13] were married. She by marriage Queen Consort Aragon. She the daughter of [her uncle] Henry III King Castile and [her future mother-in-law] Catherine of Lancaster Queen Consort Castile [aged 42]. He the son of [her father] Ferdinand I King Aragon [aged 34] and Eleanor of Alberquerque Queen Consort Aragon [aged 41]. They were first cousins. She a great granddaughter of King Edward III of England.
On 2nd April 1416 [her father] Ferdinand I King Aragon [aged 35] died. His son [her brother] Alfonso [aged 20] succeeded V King Aragon.
In 1418 John II King Castile [aged 12] and Maria Trastámara Queen Consort Castile [aged 22] were married. She by marriage Queen Consort Castile. She the daughter of Ferdinand I King Aragon and Eleanor of Alberquerque Queen Consort Aragon [aged 44]. He the son of Henry III King Castile and Catherine of Lancaster Queen Consort Castile [aged 44]. They were first cousins. He a great grandson of King Edward III of England.
Before 29th May 1421 [her brother] John II King Aragon [aged 22] and [her sister-in-law] Blanche Évreux Queen Consort Aragon [aged 33] were married. She by marriage Queen Consort Aragon. She the daughter of Charles III King Navarre [aged 60] and Eleanor of Castile Queen Consort Navarre [aged 58]. He the son of [her father] Ferdinand I King Aragon and [her mother] Eleanor of Alberquerque Queen Consort Aragon [aged 47]. They were first cousin once removed. She a great x 5 granddaughter of King Henry III of England.
In 1422 [her daughter] Catherine Trastámara was born to [her husband] John II King Castile [aged 16] and Maria Trastámara Queen Consort Castile [aged 26]. She a great x 2 granddaughter of King Edward III of England. Coefficient of inbreeding 8.98%. She died aged two in 1424.
In 1423 [her daughter] Eleanor Trastámara was born to [her husband] John II King Castile [aged 17] and Maria Trastámara Queen Consort Castile [aged 27]. She a great x 2 granddaughter of King Edward III of England. Coefficient of inbreeding 8.98%. She died aged two in 1425.
In 1424 [her daughter] Catherine Trastámara [aged 2] died.
The Deeds of the Dukes of Normandy
The Gesta Normannorum Ducum [The Deeds of the Dukes of Normandy] is a landmark medieval chronicle tracing the rise and fall of the Norman dynasty from its early roots through the pivotal events surrounding the Norman Conquest of England. Originally penned in Latin by the monk William of Jumièges shortly before 1060 and later expanded at the behest of William the Conqueror, the work chronicles the deeds, politics, battles, and leadership of the Norman dukes, especially William’s own claim to the English throne. The narrative combines earlier historical sources with firsthand information and oral testimony to present an authoritative account of Normandy’s transformation from a Viking settlement into one of medieval Europe’s most powerful realms. William’s history emphasizes the legitimacy, military prowess, and governance of the Norman line, framing their expansion, including the conquest of England, as both divinely sanctioned and noble in purpose. Later chroniclers such as Orderic Vitalis and Robert of Torigni continued the history, extending the coverage into the 12th century, providing broader context on ducal rule and its impact. Today this classic work remains a foundational source for understanding Norman identity, medieval statesmanship, and the historical forces that reshaped England and Western Europe between 800AD and 1100AD.
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In 1425 [her daughter] Eleanor Trastámara [aged 2] died.
On 5th January 1425 [her son] Henry IV King Castile was born to [her husband] John II King Castile [aged 19] and Maria Trastámara Queen Consort Castile [aged 29]. He a great x 2 grandson of King Edward III of England. Coefficient of inbreeding 8.98%. He married (1) 1440 his first cousin Blanche Trastámara II Queen Navarre, daughter of John II King Aragon and Blanche Évreux Queen Consort Aragon (2) 1455 his first cousin Joan Aviz Queen Consort Castile, daughter of Edward "The Philosopher" I King Portugal and Eleanor Trastámara Queen Consort Portugal, and had issue.
In 1428 [her daughter] Infanta Maria Trastámara was born to [her husband] John II King Castile [aged 22] and Maria Trastámara Queen Consort Castile [aged 32]. She a great x 2 granddaughter of King Edward III of England. Coefficient of inbreeding 8.98%. She died aged one in 1429.
In 1429 [her daughter] Infanta Maria Trastámara [aged 1] died.
On 16th December 1435 [her mother] Eleanor of Alberquerque Queen Consort Aragon [aged 61] died.
In 1440 Henry IV King Castile [aged 14] and Blanche Trastámara II Queen Navarre [aged 16] were married. She the daughter of John II King Aragon [aged 41] and Blanche Évreux Queen Consort Aragon [aged 52]. He the son of John II King Castile [aged 34] and Maria Trastámara Queen Consort Castile [aged 44]. They were first cousins. He a great x 2 grandson of King Edward III of England.
After 1441 [her brother] John II King Aragon [aged 42] and [her sister-in-law] Juana Enríquez Queen Consort Aragon [aged 16] were married. She by marriage Queen Consort Aragon. The difference in their ages was 26 years. She the daughter of Fadrique Enríquez Count Melgar Count Rueda [aged 51] and Mariana Fernández Countess Melgar. He the son of [her father] Ferdinand I King Aragon and [her mother] Eleanor of Alberquerque Queen Consort Aragon. They were second cousin once removed.
In 1445 Maria Trastámara Queen Consort Castile [aged 49] died.
After 1445 [her former husband] John II King Castile [aged 39] and Isabella Aviz Queen Consort Castile [aged 17] were married. She by marriage Queen Consort Castile. The difference in their ages was 22 years. He the son of [her uncle] Henry III King Castile and [her former mother-in-law] Catherine of Lancaster Queen Consort Castile. They were half first cousin once removed. He a great grandson of King Edward III of England. She a great x 2 granddaughter of King Edward III of England.
On 20th July 1454 [her former husband] John II King Castile [aged 49] died. His son Henry [aged 29] succeeded IV King Castile. Blanche Trastámara II Queen Navarre [aged 30] by marriage Queen Consort Castile.
Kings Wessex: Great x 12 Grand Daughter of King Edmund "Ironside" I of England
Kings Godwinson: Great x 11 Grand Daughter of King Harold II of England
Kings England: Great x 7 Grand Daughter of King Henry "Curtmantle" II of England
Kings Scotland: Great x 10 Grand Daughter of King Malcolm III of Scotland
Kings France: Great x 5 Grand Daughter of King Louis IX of France
Kings Duke Aquitaine: Great x 16 Grand Daughter of Ranulf I Duke Aquitaine
Kings Spain: Great x 7 Grand Daughter of Alfonso VII King Castile VII King Leon
Great x 4 Grandfather: Sancho IV King Castile IV King Leon 
2 x Great Grandson of Alfonso II King Aragon
Great x 3 Grandfather: Ferdinand IV King Castile IV King Leon 3 x Great Grandson of Alfonso II King Aragon
Great x 4 Grandmother: Maria Molina Queen Consort Castile Queen Consort Leon
Great x 2 Grandfather: Alfonso "Avenger" XI King Castile 4 x Great Grandson of Alfonso II King Aragon
Great x 4 Grandfather: Denis I King Portugal 
2 x Great Grandson of King Henry "Curtmantle" II of England
Great x 3 Grandmother: Constance Burgundy Queen Consort Castile Queen Consort Leon 3 x Great Granddaughter of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Elisabeth Barcelona Queen Consort Portugal 
2 x Great Granddaughter of Alfonso II King Aragon
Great x 1 Grandfather: Henry "Fratricide" II King Castile 5 x Great Grandson of Alfonso II King Aragon
Great x 2 Grandmother: Eleanor Guzman
Grandfather: John I King Castile 3 x Great Grandson of King Louis IX of France
Great x 4 Grandfather: Ferdinand III King Castile III King Leon Great Grandson of Alfonso VII King Castile VII King Leon
Great x 3 Grandfather: Manuel Ivrea 2 x Great Grandson of Alfonso VII King Castile VII King Leon
Great x 4 Grandmother: Elisabeth Hohenstaufen Queen Consort Castile Queen Consort Leon 
9 x Great Granddaughter of King Alfred "The Great" of Wessex
Great x 2 Grandfather: Juan Manuel Prince of Villena 3 x Great Grandson of Alfonso VII King Castile VII King Leon
Great x 4 Grandfather: Amedeo Savoy IV Count Savoy 13 x Great Grandson of Charles "Charlemagne aka Great" King of the Franks King Lombardy Holy Roman Emperor
Great x 3 Grandmother: Beatrice Savoy 14 x Great Granddaughter of Charles "Charlemagne aka Great" King of the Franks King Lombardy Holy Roman Emperor
Great x 4 Grandmother: Cecilia Baux Countess Savoy 
Great x 1 Grandmother: Juana Manuel Queen of Castile 2 x Great Granddaughter of King Louis IX of France
Great x 4 Grandfather: Ferdinand de la Cerda Ivrea 2 x Great Grandson of Alfonso II King Aragon
Great x 3 Grandfather: Ferdinando de la Cerda Grandson of King Louis IX of France
Great x 4 Grandmother: Blanche Capet 
daughter of King Louis IX of France
Great x 2 Grandmother: Blanca de la Cerda y Lara Great Granddaughter of King Louis IX of France
Great x 4 Grandfather: Juan Núñez de Lara
Great x 3 Grandmother: Juana "La Palomilla" Núñez de Lara 3 x Great Granddaughter of Alfonso II King Aragon
Great x 4 Grandmother: Teresa Díaz de Haro 2 x Great Granddaughter of Alfonso II King Aragon
father: Ferdinand I King Aragon 4 x Great Grandson of King Louis IX of France
Great x 4 Grandfather: Peter III King Aragon Great Grandson of Alfonso II King Aragon
Great x 3 Grandfather: James "The Just" II King Aragon 2 x Great Grandson of Alfonso II King Aragon
Great x 4 Grandmother: Constance Hohenstaufen Queen Consort Aragon 5 x Great Granddaughter of King William "Conqueror" I of England
Great x 2 Grandfather: Alfonso IV King Aragon 2 x Great Grandson of King Louis VIII of France
Great x 4 Grandfather: Charles II King Naples Grandson of King Louis VIII of France
Great x 3 Grandmother: Blanche Capet Queen Consort Aragon Great Granddaughter of King Louis VIII of France
Great x 4 Grandmother: Mary of Hungary Queen Consort Naples 6 x Great Granddaughter of King Harold II of England
Great x 1 Grandfather: Peter IV King Aragon 3 x Great Grandson of King Louis VIII of France
Great x 2 Grandmother: Teresa Enteca Queen Consort Aragon
Grandmother: Eleanor Barcelona Queen Consort Castile 4 x Great Granddaughter of King Louis VIII of France
Great x 4 Grandfather: Peter III King Aragon Great Grandson of Alfonso II King Aragon
Great x 3 Grandfather: Frederick III King Sicily 2 x Great Grandson of Alfonso II King Aragon
Great x 2 Grandfather: Peter II King Sicily 2 x Great Grandson of King Louis VIII of France
Great x 4 Grandfather: Charles II King Naples Grandson of King Louis VIII of France
Great x 3 Grandmother: Eleanor Capet Great Granddaughter of King Louis VIII of France
Great x 4 Grandmother: Mary of Hungary Queen Consort Naples 6 x Great Granddaughter of King Harold II of England
Great x 1 Grandmother: Eleanor of Sicily Queen Consort Aragon 3 x Great Granddaughter of King Louis VIII of France
Maria Trastámara Queen Consort Castile 5 x Great Granddaughter of King Louis IX of France
Great x 4 Grandfather: Alfonso X King Castile X King Leon 2 x Great Grandson of Alfonso VII King Castile VII King Leon
Great x 3 Grandfather: Sancho IV King Castile IV King Leon 2 x Great Grandson of Alfonso II King Aragon
Great x 4 Grandmother: Violante Barcelona Queen Consort Castile Queen Consort Leon Great Granddaughter of Alfonso II King Aragon
Great x 2 Grandfather: Ferdinand IV King Castile IV King Leon 3 x Great Grandson of Alfonso II King Aragon
Great x 3 Grandmother: Maria Molina Queen Consort Castile Queen Consort Leon
Great x 1 Grandfather: Alfonso "Avenger" XI King Castile 4 x Great Grandson of Alfonso II King Aragon
Great x 4 Grandfather: Alfonso III King Portugal Great Grandson of King Henry "Curtmantle" II of England
Great x 3 Grandfather: Denis I King Portugal 2 x Great Grandson of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Beatrice Queen Consort Portugal 3 x Great Granddaughter of Alfonso VII King Castile VII King Leon
Great x 2 Grandmother: Constance Burgundy Queen Consort Castile Queen Consort Leon 3 x Great Granddaughter of King Henry "Curtmantle" II of England
Great x 4 Grandfather: Peter III King Aragon Great Grandson of Alfonso II King Aragon
Great x 3 Grandmother: Elisabeth Barcelona Queen Consort Portugal 2 x Great Granddaughter of Alfonso II King Aragon
Great x 4 Grandmother: Constance Hohenstaufen Queen Consort Aragon 5 x Great Granddaughter of King William "Conqueror" I of England
Grandfather: Sancho Alfonso Ivrea 5 x Great Grandson of Alfonso II King Aragon
Great x 1 Grandmother: Eleanor Guzman
mother: Eleanor of Alberquerque Queen Consort Aragon 6 x Great Granddaughter of Alfonso II King Aragon
Great x 4 Grandfather: Alfonso III King Portugal Great Grandson of King Henry "Curtmantle" II of England
Great x 3 Grandfather: Denis I King Portugal 2 x Great Grandson of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Beatrice Queen Consort Portugal 3 x Great Granddaughter of Alfonso VII King Castile VII King Leon
Great x 2 Grandfather: Alfonso "Brave" IV King Portugal 3 x Great Grandson of King Henry "Curtmantle" II of England
Great x 4 Grandfather: Peter III King Aragon Great Grandson of Alfonso II King Aragon
Great x 3 Grandmother: Elisabeth Barcelona Queen Consort Portugal 2 x Great Granddaughter of Alfonso II King Aragon
Great x 4 Grandmother: Constance Hohenstaufen Queen Consort Aragon 5 x Great Granddaughter of King William "Conqueror" I of England
Great x 1 Grandfather: Peter I King Portugal 4 x Great Grandson of King Henry "Curtmantle" II of England
Great x 4 Grandfather: Alfonso X King Castile X King Leon 2 x Great Grandson of Alfonso VII King Castile VII King Leon
Great x 3 Grandfather: Sancho IV King Castile IV King Leon 2 x Great Grandson of Alfonso II King Aragon
Great x 4 Grandmother: Violante Barcelona Queen Consort Castile Queen Consort Leon Great Granddaughter of Alfonso II King Aragon
Great x 2 Grandmother: Beatrice Ivrea Queen Consort Portugal 3 x Great Granddaughter of Alfonso II King Aragon
Great x 3 Grandmother: Maria Molina Queen Consort Castile Queen Consort Leon
Grandmother: Beatrice Burgundy 5 x Great Granddaughter of King Henry "Curtmantle" II of England
Great x 2 Grandfather: Pedro Fernández de Castro
Great x 1 Grandmother: Inês Castro