Paternal Family Tree: Ivrea
Maternal Family Tree: Beatrice of Albon Duchess Burgundy 1161-1228
On 23rd January 1302 [his father] Ferdinand IV King Castile IV King Leon [aged 16] and [his mother] Constance Burgundy Queen Consort Castile Queen Consort Leon [aged 12] were married. She by marriage Queen Consort Castile, Queen Consort Leon. She the daughter of [his grandfather] Denis I King Portugal [aged 40] and [his grandmother] Elisabeth Barcelona Queen Consort Portugal [aged 31]. He the son of Sancho IV King Castile IV King Leon and Maria Molina Queen Consort Castile Queen Consort Leon. They were half first cousin once removed. He a great x 4 grandson of King Henry "Curtmantle" II of England. She a great x 3 granddaughter of King Henry "Curtmantle" II of England.
On 13th August 1311 Alfonso "Avenger" XI King Castile was born to Ferdinand IV King Castile IV King Leon [aged 25] and Constance Burgundy Queen Consort Castile Queen Consort Leon [aged 21]. He a great x 4 grandson of King Henry "Curtmantle" II of England. Coefficient of inbreeding 3.60%.
On 7th September 1312 [his father] Ferdinand IV King Castile IV King Leon [aged 26] died. His son Alfonso [aged 1] succeeded XI King Castile.
On 18th November 1313 [his mother] Constance Burgundy Queen Consort Castile Queen Consort Leon [aged 23] died.
In 1325 Alfonso "Avenger" XI King Castile [aged 13] and Constanza Manuel Queen Consort Castile [aged 9] were married. She by marriage Queen Consort Castile. The marriage was annulled in 1327; there was no issue from the marriage. He the son of Ferdinand IV King Castile IV King Leon and Constance Burgundy Queen Consort Castile Queen Consort Leon. They were second cousins. He a great x 4 grandson of King Henry "Curtmantle" II of England. She a great x 4 granddaughter of King Henry "Curtmantle" II of England.
In 1325 the marriage of Eleanor of Woodstock Plantagenet [aged 6] to Alfonso "Avenger" XI King Castile [aged 13] was discussed but not pursued.
In 1328 Alfonso "Avenger" XI King Castile [aged 16] and Maria Burgundy Queen Consort Castile [aged 15] were married. She by marriage Queen Consort Castile. She the daughter of Alfonso "Brave" IV King Portugal [aged 36] and Beatrice Ivrea Queen Consort Portugal [aged 35]. He the son of Ferdinand IV King Castile IV King Leon and Constance Burgundy Queen Consort Castile Queen Consort Leon. They were double first cousins. He a great x 4 grandson of King Henry "Curtmantle" II of England. She a great x 4 granddaughter of King Henry "Curtmantle" II of England.
In 1331 [his illegitimate son] Sancho Alfonso Ivrea was born illegitimately to Alfonso "Avenger" XI King Castile [aged 19] and Eleanor Guzman.
In 1332 [his son] Ferdinand Ivrea was born to Alfonso "Avenger" XI King Castile [aged 20] and [his wife] Maria Burgundy Queen Consort Castile [aged 19]. Coefficient of inbreeding 14.45%. He died aged one in 1333.
Annals of the six Kings of England by Nicholas Trivet
Translation of the Annals of the Six Kings of England by that traces the rise and rule of the Angevin aka Plantagenet dynasty from the mid-12th to early 14th century. Written by the Dominican scholar Nicholas Trivet, the work offers a vivid account of English history from the reign of King Stephen through to the death of King Edward I, blending political narrative with moral reflection. Covering the reigns of six monarchs—from Stephen to Edward I—the chronicle explores royal authority, rebellion, war, and the shifting balance between crown, church, and nobility. Trivet provides detailed insight into defining moments such as baronial conflicts, Anglo-French rivalry, and the consolidation of royal power under Edward I, whose reign he describes with particular immediacy. The Annals combines careful year-by-year reporting with thoughtful interpretation, presenting history not merely as a sequence of events but as a moral and political lesson. Ideal for readers interested in medieval history, kingship, and the origins of the English state, this chronicle remains a valuable and accessible window into the turbulent world of the Plantagenet kings.
Available at Amazon in eBook and Paperback format.
In 1333 [his son] Ferdinand Ivrea [aged 1] died.
In 1334 [his illegitimate son] Pedro Alfonso Ivrea was born illegitimately to Alfonso "Avenger" XI King Castile [aged 22] and Eleanor Guzman.
On 13th January 1334 [his illegitimate son] Henry "Fratricide" II King Castile was born illegitimately to Alfonso "Avenger" XI King Castile [aged 22] and Eleanor Guzman. He was one of twins.
On 13th January 1334 [his illegitimate son] Fadrique Alfonso Ivrea was born illegitimately to Alfonso "Avenger" XI King Castile [aged 22] and Eleanor Guzman at Seville.
On 30th August 1334 [his son] Peter "Cruel" I King Castile was born to Alfonso "Avenger" XI King Castile [aged 23] and [his wife] Maria Burgundy Queen Consort Castile [aged 21]. Coefficient of inbreeding 14.45%. He married July 1353 his third cousin once removed Blanche Bourbon Queen Consort Castile, daughter of Peter Bourbon Duke Bourbon and Isabella Valois Duchess Bourbon.
In 1336 [his illegitimate son] Fernando Ivrea was born illegitimately to Alfonso "Avenger" XI King Castile [aged 24] and Eleanor Guzman.
In 1337 [his illegitimate son] Tello Ivrea was born illegitimately to Alfonso "Avenger" XI King Castile [aged 25] and Eleanor Guzman.
In 1338 [his illegitimate son] Pedro Alfonso Ivrea [aged 4] died.
On 24th August 1340 [his brother-in-law] Peter I King Portugal [aged 20] and [his wife] Constanza Manuel Queen Consort Castile [aged 24] were married. She by marriage Queen Consort Portugal. He the son of [his uncle] Alfonso "Brave" IV King Portugal [aged 49] and [his aunt] Beatrice Ivrea Queen Consort Portugal [aged 47]. They were second cousins. He a great x 4 grandson of King Henry "Curtmantle" II of England. She a great x 4 granddaughter of King Henry "Curtmantle" II of England.
In 1341 [his illegitimate son] Juan Ivrea was born illegitimately to Alfonso "Avenger" XI King Castile [aged 29] and Eleanor Guzman.
Chronicle of Geoffrey le Baker of Swinbroke
Baker was a secular clerk from Swinbroke, now Swinbrook, an Oxfordshire village two miles east of Burford. His Chronicle describes the events of the period 1303-1356: Gaveston, Bannockburn, Boroughbridge, the murder of King Edward II, the Scottish Wars, Sluys, Crécy, the Black Death, Winchelsea and Poitiers. To quote Herbert Bruce 'it possesses a vigorous and characteristic style, and its value for particular events between 1303 and 1356 has been recognised by its editor and by subsequent writers'. The book provides remarkable detail about the events it describes. Baker's text has been augmented with hundreds of notes, including extracts from other contemporary chronicles, such as the Annales Londonienses, Annales Paulini, Murimuth, Lanercost, Avesbury, Guisborough and Froissart to enrich the reader's understanding. The translation takes as its source the 'Chronicon Galfridi le Baker de Swynebroke' published in 1889, edited by Edward Maunde Thompson.
Available at Amazon in eBook and Paperback format.
In 1342 [his illegitimate daughter] Juana Ivrea was born illegitimately to Alfonso "Avenger" XI King Castile [aged 30] and Eleanor Guzman.
In 1343 [his illegitimate son] Sancho Ivrea Count of Alberquerque was born illegitimately to Alfonso "Avenger" XI King Castile [aged 31] and Eleanor Guzman.
In 1345 [his illegitimate son] Pedro Ivrea was born illegitimately to Alfonso "Avenger" XI King Castile [aged 33] and Eleanor Guzman.
On 15th November 1347 Peter IV King Aragon [aged 28] and [his sister-in-law] Eleanor Burgundy Queen Consort Aragon [aged 19] were married. She by marriage Queen Consort Aragon. She the daughter of [his uncle] Alfonso "Brave" IV King Portugal [aged 56] and [his aunt] Beatrice Ivrea Queen Consort Portugal [aged 54]. He the son of Alfonso IV King Aragon and Teresa Enteca Queen Consort Aragon. They were second cousins. He a great x 5 grandson of King Henry "Curtmantle" II of England. She a great x 4 granddaughter of King Henry "Curtmantle" II of England.
On 30th October 1348 [his sister-in-law] Eleanor Burgundy Queen Consort Aragon [aged 20] died of plague. See Masearo, Condes de Barcelona, Volume 2, p. 274.
On 13th January 1349 [his wife] Constanza Manuel Queen Consort Castile [aged 33] died.
In or before 1350 [his brother-in-law] Peter I King Portugal [aged 29] and Inês Castro [aged 24] were married. She by marriage Queen Consort Portugal. There is some uncertainty as to whether they were married. He announced their marriage in 1357 after he succeeded, and after her death, thereby ensuring their children were legitimate. He the son of [his uncle] Alfonso "Brave" IV King Portugal [aged 58] and [his aunt] Beatrice Ivrea Queen Consort Portugal [aged 56].
Around 1350 [his illegitimate son] Fernando Ivrea [aged 14] died.
On 26th March 1350 Alfonso "Avenger" XI King Castile [aged 38] died of plague. His son Peter [aged 15] succeeded I King Castile.
On 18th January 1357 [his former wife] Maria Burgundy Queen Consort Castile [aged 44] died.
Kings Wessex: Great x 9 Grand Son of King Edmund "Ironside" I of England
Kings Godwinson: Great x 8 Grand Son of King Harold II of England
Kings England: Great x 4 Grand Son of King Henry "Curtmantle" II of England
Kings Scotland: Great x 7 Grand Son of King Malcolm III of Scotland
Kings France: Great x 9 Grand Son of Hugh I King of the Franks
Kings Duke Aquitaine: Great x 13 Grand Son of Ranulf I Duke Aquitaine
Kings Spain: Great x 4 Grand Son of Alfonso II King Aragon
Great x 4 Grandfather: Ferdinand II King Leon 
son of Alfonso VII King Castile VII King Leon
Great x 3 Grandfather: Alfonso IX King Leon Grandson of Alfonso VII King Castile VII King Leon
Great x 4 Grandmother: Urraca Burgundy Queen Consort Leon 
4 x Great Granddaughter of Hugh I King of the Franks
Great x 2 Grandfather: Ferdinand III King Castile III King Leon Great Grandson of Alfonso VII King Castile VII King Leon
Great x 4 Grandfather: Alfonso VIII King Castile Grandson of Alfonso VII King Castile VII King Leon
Great x 3 Grandmother: Berengaria Ivrea I Queen Castile Granddaughter of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Eleanor Plantagenet Queen Consort Castile 
daughter of King Henry "Curtmantle" II of England
Great x 1 Grandfather: Alfonso X King Castile X King Leon 2 x Great Grandson of Alfonso VII King Castile VII King Leon
Great x 4 Grandfather: Frederick "Barbarossa" Hohenstaufen I Holy Roman Emperor 
7 x Great Grandson of King Alfred "The Great" of Wessex
Great x 3 Grandfather: Philip King Germany 8 x Great Grandson of King Alfred "The Great" of Wessex
Great x 4 Grandmother: Beatrice of Burgundy Holy Roman Empress 7 x Great Granddaughter of King Edward "Elder" of the Anglo Saxons
Great x 2 Grandmother: Elisabeth Hohenstaufen Queen Consort Castile Queen Consort Leon 9 x Great Granddaughter of King Alfred "The Great" of Wessex
Grandfather: Sancho IV King Castile IV King Leon 2 x Great Grandson of Alfonso II King Aragon
Great x 4 Grandfather: Alfonso II King Aragon 
-2 x Great Grandson of Alfonso II King Aragon
Great x 3 Grandfather: Peter II King Aragon son of Alfonso II King Aragon
Great x 4 Grandmother: Sancha Ivrea Queen Consort Aragon daughter of Alfonso VII King Castile VII King Leon
Great x 2 Grandfather: James I King Aragon Grandson of Alfonso II King Aragon
Great x 3 Grandmother: Marie Montpellier Queen Consort Aragon
Great x 1 Grandmother: Violante Barcelona Queen Consort Castile Queen Consort Leon Great Granddaughter of Alfonso II King Aragon
Great x 4 Grandfather: King Béla III of Hungary 2 x Great Grandson of King Harold II of England
Great x 3 Grandfather: King Andrew II of Hungary 3 x Great Grandson of King Harold II of England
Great x 4 Grandmother: Agnes of Antioch 5 x Great Granddaughter of Hugh I King of the Franks
Great x 2 Grandmother: Violant Árpád Queen Consort Aragon 4 x Great Granddaughter of King Harold II of England
father: Ferdinand IV King Castile IV King Leon 3 x Great Grandson of Alfonso II King Aragon
Alfonso "Avenger" XI King Castile 4 x Great Grandson of Alfonso II King Aragon
Great x 4 Grandfather: Afonso "Conqueror Founder Great" I King Portugal 3 x Great Grandson of Hugh I King of the Franks
Great x 3 Grandfather: Sancho "Populator" I King Portugal 4 x Great Grandson of Hugh I King of the Franks
Great x 4 Grandmother: Malfada Savoy Queen Consort Portugal 11 x Great Granddaughter of Charles "Charlemagne aka Great" King of the Franks King Lombardy Holy Roman Emperor
Great x 2 Grandfather: Alfonso "Fat" II King Portugal 5 x Great Grandson of Hugh I King of the Franks
Great x 4 Grandfather: Raymond V Count Barcelona 11 x Great Grandson of Charles "Charlemagne aka Great" King of the Franks King Lombardy Holy Roman Emperor
Great x 3 Grandmother: Dulce Barcelona Queen Consort Portugal 12 x Great Granddaughter of Charles "Charlemagne aka Great" King of the Franks King Lombardy Holy Roman Emperor
Great x 1 Grandfather: Alfonso III King Portugal 
Great Grandson of King Henry "Curtmantle" II of England
Great x 4 Grandfather: Sancho III King Castile son of Alfonso VII King Castile VII King Leon
Great x 3 Grandfather: Alfonso VIII King Castile Grandson of Alfonso VII King Castile VII King Leon
Great x 4 Grandmother: Blanche Ramirez Queen Consort Castile
Great x 2 Grandmother: Urraca Ivrea Queen Consort Portugal Granddaughter of King Henry "Curtmantle" II of England
Great x 4 Grandfather: King Henry "Curtmantle" II of England Grandson of King Henry I "Beauclerc" England
Great x 3 Grandmother: Eleanor Plantagenet Queen Consort Castile daughter of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Eleanor of Aquitaine Queen Consort Franks and England 4 x Great Granddaughter of Hugh I King of the Franks
Grandfather: Denis I King Portugal 2 x Great Grandson of King Henry "Curtmantle" II of England
Great x 4 Grandfather: Alfonso IX King Leon Grandson of Alfonso VII King Castile VII King Leon
Great x 3 Grandfather: Ferdinand III King Castile III King Leon Great Grandson of Alfonso VII King Castile VII King Leon
Great x 4 Grandmother: Berengaria Ivrea I Queen Castile Granddaughter of King Henry "Curtmantle" II of England
Great x 2 Grandfather: Alfonso X King Castile X King Leon 2 x Great Grandson of Alfonso VII King Castile VII King Leon
Great x 4 Grandfather: Philip King Germany 8 x Great Grandson of King Alfred "The Great" of Wessex
Great x 3 Grandmother: Elisabeth Hohenstaufen Queen Consort Castile Queen Consort Leon 9 x Great Granddaughter of King Alfred "The Great" of Wessex
Great x 1 Grandmother: Beatrice Queen Consort Portugal 3 x Great Granddaughter of Alfonso VII King Castile VII King Leon
Great x 2 Grandmother: Mayor Guillén de Guzmán
mother: Constance Burgundy Queen Consort Castile Queen Consort Leon 3 x Great Granddaughter of King Henry "Curtmantle" II of England
Great x 4 Grandfather: Alfonso II King Aragon -2 x Great Grandson of Alfonso II King Aragon
Great x 3 Grandfather: Peter II King Aragon son of Alfonso II King Aragon
Great x 4 Grandmother: Sancha Ivrea Queen Consort Aragon daughter of Alfonso VII King Castile VII King Leon
Great x 2 Grandfather: James I King Aragon Grandson of Alfonso II King Aragon
Great x 3 Grandmother: Marie Montpellier Queen Consort Aragon
Great x 1 Grandfather: Peter III King Aragon Great Grandson of Alfonso II King Aragon
Great x 4 Grandfather: King Béla III of Hungary 2 x Great Grandson of King Harold II of England
Great x 3 Grandfather: King Andrew II of Hungary 3 x Great Grandson of King Harold II of England
Great x 4 Grandmother: Agnes of Antioch 5 x Great Granddaughter of Hugh I King of the Franks
Great x 2 Grandmother: Violant Árpád Queen Consort Aragon 4 x Great Granddaughter of King Harold II of England
Grandmother: Elisabeth Barcelona Queen Consort Portugal 2 x Great Granddaughter of Alfonso II King Aragon
Great x 4 Grandfather: Henry Hohenstaufen VI Holy Roman Emperor 8 x Great Grandson of King Alfred "The Great" of Wessex
Great x 3 Grandfather: Frederick I King Jerusalem II Holy Roman Emperor 9 x Great Grandson of King Alfred "The Great" of Wessex
Great x 2 Grandfather: Manfred King Sicily 10 x Great Grandson of King Alfred "The Great" of Wessex
Great x 3 Grandmother: Bianca Lancia
Great x 1 Grandmother: Constance Hohenstaufen Queen Consort Aragon 5 x Great Granddaughter of King William "Conqueror" I of England
Great x 4 Grandfather: Thomas Savoy I Count Savoy 12 x Great Grandson of Charles "Charlemagne aka Great" King of the Franks King Lombardy Holy Roman Emperor
Great x 3 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 4 Grandmother: Margaret Geneva Countess Savoy
Great x 2 Grandmother: Beatrice Savoy Marchioness of Saluzzo 4 x Great Granddaughter of King William "Conqueror" I of England
Great x 4 Grandfather: Hugh III Duke Burgundy 
2 x Great Grandson of King William "Conqueror" I of England
Great x 3 Grandmother: Margaret Burgundy Countess Savoy 3 x Great Granddaughter of King William "Conqueror" I of England
Great x 4 Grandmother: Beatrice of Albon Duchess Burgundy