Paternal Family Tree: Ivrea
Maternal Family Tree: Elizabeth Cuman
In 1260 [her grandfather] Manuel Ivrea [aged 26] and [her mother] Constance Barcelona were married. She the daughter of James "The Just" II King Aragon and Blanche Capet Queen Consort Aragon. He the son of Ferdinand III King Castile III King Leon and Elisabeth Hohenstaufen Queen Consort Castile Queen Consort Leon. They were second cousin twice removed. He a great x 2 grandson of King Henry "Curtmantle" II of England. She a great x 4 granddaughter of King Henry "Curtmantle" II of England.
Around 1316 Constanza Manuel Queen Consort Castile was born to Juan Manuel Prince of Villena [aged 33] and Constance Barcelona. She a great x 4 granddaughter of King Henry "Curtmantle" II of England. Coefficient of inbreeding 1.66%.
On Before 1318 [her father] Juan Manuel Prince of Villena [aged 35] and [her mother] Constance Barcelona were married. She the daughter of [her grandfather] James "The Just" II King Aragon [aged 50] and [her grandmother] Blanche Capet Queen Consort Aragon. They were half first cousin twice removed. He a great x 3 grandson of King Henry "Curtmantle" II of England. She a great x 4 granddaughter of King Henry "Curtmantle" II of England.
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 1328 [her husband] Alfonso "Avenger" XI King Castile [aged 16] and [her future sister-in-law] Maria Burgundy Queen Consort Castile [aged 15] were married. She by marriage Queen Consort Castile. She the daughter of [her future father-in-law] Alfonso "Brave" IV King Portugal [aged 36] and [her future mother-in-law] 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.
Before 1339 [her father] Juan Manuel Prince of Villena [aged 56] and [her step-mother] Blanca de la Cerda y Lara [aged 21] were married. The difference in their ages was 34 years. They were first cousin twice removed. He a great x 3 grandson of King Henry "Curtmantle" II of England. She a great x 4 granddaughter of King Henry "Curtmantle" II of England.
On 24th August 1340 Peter I King Portugal [aged 20] and Constanza Manuel Queen Consort Castile [aged 24] were married. She by marriage Queen Consort Portugal. He the son of Alfonso "Brave" IV King Portugal [aged 49] and 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.
On 31st October 1345 [her son] Ferdinand I King Portugal was born to [her husband] Peter I King Portugal [aged 25] and Constanza Manuel Queen Consort Castile [aged 29]. Coefficient of inbreeding 3.84%. He married 1371 Leonor Teles Meneses Queen Consort Portugal and had issue.
On 15th November 1347 Peter IV King Aragon [aged 28] and [her sister-in-law] Eleanor Burgundy Queen Consort Aragon [aged 19] were married. She by marriage Queen Consort Aragon. She the daughter of [her father-in-law] Alfonso "Brave" IV King Portugal [aged 56] and [her mother-in-law] Beatrice Ivrea Queen Consort Portugal [aged 54]. He the son of [her uncle] 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 13th June 1348 [her father] Juan Manuel Prince of Villena [aged 66] died.
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On 30th October 1348 [her 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 Constanza Manuel Queen Consort Castile [aged 33] died.
In or before 1350 [her former husband] 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 [her former father-in-law] Alfonso "Brave" IV King Portugal [aged 58] and [her former mother-in-law] Beatrice Ivrea Queen Consort Portugal [aged 56].
On 26th March 1350 [her former husband] Alfonso "Avenger" XI King Castile [aged 38] died of plague. His son Peter [aged 15] succeeded I King Castile.
On 18th January 1367 [her former husband] Peter I King Portugal [aged 46] died. His son Ferdinand [aged 21] succeeded I King Portugal.
Kings Wessex: Great x 9 Grand Daughter of King Edmund "Ironside" I of England
Kings Godwinson: Great x 8 Grand Daughter of King Harold II of England
Kings England: Great x 4 Grand Daughter of King Henry "Curtmantle" II of England
Kings Scotland: Great x 7 Grand Daughter of King Malcolm III of Scotland
Kings France: Great x 3 Grand Daughter of King Louis VIII of France
Kings Duke Aquitaine: Great x 13 Grand Daughter of Ranulf I Duke Aquitaine
Kings Spain: Great x 4 Grand Daughter of Alfonso VII King Castile VII King Leon
Great x 4 Grandfather: Alfonso VII King Castile VII King Leon 
-2 x Great Grandson of Alfonso VII King Castile VII King Leon
Great x 3 Grandfather: Ferdinand II King Leon son of Alfonso VII King Castile VII King Leon
Great x 4 Grandmother: Berenguela Barcelona Queen Consort Castile and Leon 11 x Great Granddaughter of Charles "Charlemagne aka Great" King of the Franks King Lombardy Holy Roman Emperor
Great x 2 Grandfather: Alfonso IX King Leon Grandson of Alfonso VII King Castile VII King Leon
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 Grandmother: Urraca Burgundy Queen Consort Leon 4 x Great Granddaughter 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 1 Grandfather: Ferdinand III King Castile III King Leon Great Grandson of Alfonso VII King Castile VII King Leon
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: Berengaria Ivrea I Queen Castile 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: Manuel Ivrea 2 x Great Grandson of Alfonso VII King Castile VII King Leon
Great x 4 Grandfather: Frederick "One Eyed" Hohenstaufen I Holy Roman Emperor 
Great x 3 Grandfather: Frederick "Barbarossa" Hohenstaufen I Holy Roman Emperor 7 x Great Grandson of King Alfred "The Great" of Wessex
Great x 4 Grandmother: Judith Welf Holy Roman Empress 6 x Great Granddaughter of King Alfred "The Great" of Wessex
Great x 2 Grandfather: Philip King Germany 8 x Great Grandson of King Alfred "The Great" of Wessex
Great x 4 Grandfather: Reginald Ivrea III Count Burgundy 6 x Great Grandson of King Edward "Elder" of the Anglo Saxons
Great x 3 Grandmother: Beatrice of Burgundy Holy Roman Empress 7 x Great Granddaughter of King Edward "Elder" of the Anglo Saxons
Great x 1 Grandmother: Elisabeth Hohenstaufen Queen Consort Castile Queen Consort Leon 9 x Great Granddaughter of King Alfred "The Great" of Wessex
father: Juan Manuel Prince of Villena 3 x Great Grandson of Alfonso VII King Castile VII King Leon
Great x 4 Grandfather: Amadeus Savoy III Count Savoy 10 x Great Grandson of Charles "Charlemagne aka Great" King of the Franks King Lombardy Holy Roman Emperor
Great x 3 Grandfather: Humbert Savoy III Count Savoy 11 x Great Grandson of Charles "Charlemagne aka Great" King of the Franks King Lombardy Holy Roman Emperor
Great x 4 Grandmother: Mahaut Albon Countess Savoy
Great x 2 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 Grandmother: Beatrice Macon Countess Savoy
Great x 1 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 Grandfather: William I Count Geneva
Great x 2 Grandmother: Margaret Geneva Countess Savoy
Grandmother: Beatrice Savoy 14 x Great Granddaughter of Charles "Charlemagne aka Great" King of the Franks King Lombardy Holy Roman Emperor
Great x 2 Grandfather: Barral of Baux 
Great x 1 Grandmother: Cecilia Baux Countess Savoy
Constanza Manuel Queen Consort Castile 3 x Great Granddaughter of King Louis VIII of France
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
Grandfather: James "The Just" II King Aragon 2 x Great Grandson 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
mother: Constance Barcelona 2 x Great Granddaughter of King Louis VIII of France
Great x 4 Grandfather: King Philip II of France 2 x Great Grandson of King William "Conqueror" I of England
Great x 3 Grandfather: King Louis VIII of France son of King Philip II of France
Great x 4 Grandmother: Isabelle Flanders Queen Consort France 5 x Great Granddaughter of Hugh I King of the Franks
Great x 2 Grandfather: King Charles Capet of Sicily son of King Louis VIII of France
Great x 4 Grandfather: Alfonso VIII King Castile Grandson of Alfonso VII King Castile VII King Leon
Great x 3 Grandmother: Blanche Ivrea Queen Consort France 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: Charles II King Naples Grandson of King Louis VIII of France
Great x 4 Grandfather: Alfonso Barcelona II Count Provence son of Alfonso II King Aragon
Great x 3 Grandfather: Raymond IV Count Provence Grandson of Alfonso II King Aragon
Great x 4 Grandmother: Gersenda II Sabran Countess Provence
Great x 2 Grandmother: Beatrice Provence Queen Consort Sicily Great Granddaughter of Alfonso II King Aragon
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 Grandmother: Beatrice Savoy Countess Provence 13 x Great Granddaughter of Charles "Charlemagne aka Great" King of the Franks King Lombardy Holy Roman Emperor
Great x 4 Grandmother: Margaret Geneva Countess Savoy
Grandmother: Blanche Capet Queen Consort Aragon Great Granddaughter of King Louis VIII of France
Great x 4 Grandfather: King Andrew II of Hungary 3 x Great Grandson of King Harold II of England
Great x 3 Grandfather: Béla IV King of Hungary 4 x Great Grandson of King Harold II of England
Great x 2 Grandfather: Stephen V of Hungary 5 x Great Grandson of King Harold II of England
Great x 1 Grandmother: Mary of Hungary Queen Consort Naples 6 x Great Granddaughter of King Harold II of England
Great x 2 Grandmother: Elizabeth Cuman