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Paternal Family Tree: Capet
Maternal Family Tree: Leonor de Alvim
In 1552 [his father] John Manuel Aviz Prince Portugal (age 14) and [his mother] Joanna of Austria Princess Portugal (age 16) were married. She the daughter of [his grandfather] Charles V Holy Roman Emperor (age 51) and [his grandmother] Isabel Aviz Queen Consort Spain. He the son of [his grandfather] John III King Portugal (age 49) and [his grandmother] Catherine of Austria Queen Consort Portugal (age 44). They were double first cousins. He a great x 5 grandson of King Edward III of England. She a great x 5 granddaughter of King Edward III of England.
On 2nd January 1554 [his father] John Manuel Aviz Prince Portugal (age 16) died.
On 20th January 1554 Sebastian King Portugal was born to John Manuel Aviz Prince Portugal (deceased) and Joanna of Austria Princess Portugal (age 18). He was named after Saint Sebastian on whose Feast Day he was born. At birth he was heir apparent to the throne of Portugal since his father had died two weeks before his birth. Soon after his birth his mother Joanna of Austria Princess Portugal left Portugal to become Regent of Spain for her father serving in the same capacity for her brother after her father's abdication. She never saw him. Coefficient of inbreeding 20.02%.
On 11th June 1557 [his grandfather] John III King Portugal (age 55) died. His grandson Sebastian (age 3) succeeded King Portugal. Sebastian's paternal grandmother [his grandmother] Catherine of Austria Queen Consort Portugal (age 50) acted as Regent during his minority being replaced by Henrique Aviz Cardinal King Portugal (age 45) when she resigned in 1562.
On 7th September 1573 [his mother] Joanna of Austria Princess Portugal (age 38) died.
On 4th August 1578 Sebastian King Portugal (age 24) was killed at the Battle of Alcácer Quibir or the Three Kings. He was succeeded by his great uncle Henrique Aviz Cardinal King Portgal 1512-1580.
Kings Wessex: Great x 16 Grand Son of King Edmund "Ironside" I of England
Kings Gwynedd: Great x 20 Grand Son of Maredudd ab Owain King Deheubarth King Powys King Gwynedd
Kings Seisyllwg: Great x 22 Grand Son of Hywel "Dda aka Good" King Seisyllwg King Deheubarth
Kings Powys: Great x 20 Grand Son of Maredudd ab Owain King Deheubarth King Powys King Gwynedd
Kings England: Great x 6 Grand Son of King Edward III of England
Kings Scotland: Great x 15 Grand Son of King Duncan I of Scotland
Kings Franks: Great x 12 Grand Son of Louis VII King Franks
Kings France: Great x 8 Grand Son of King Philip IV of France
Kings Duke Aquitaine: Great x 20 Grand Son of Ranulf I Duke Aquitaine
Great x 4 Grandfather: King John I of Portugal 5 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandfather: Edward "The Philosopher" I King Portugal Great Grand Son of King Edward III of England
Great x 4 Grandmother: Philippa of Lancaster Queen Consort Portugal Grand Daughter of King Edward III of England
Great x 2 Grandfather: Ferdinand Aviz 2nd Duke Viseu 2 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: Ferdinand I King Aragon 6 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandmother: Eleanor Trastámara Queen Consort Portugal 7 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Eleanor of Alberquerque Queen Consort Aragon 6 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 1 Grandfather: Manuel "Fortunate" I King Portugal 3 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: King John I of Portugal 5 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandfather: Prince John Aviz Constable Portugal Great Grand Son of King Edward III of England
Great x 4 Grandmother: Philippa of Lancaster Queen Consort Portugal Grand Daughter of King Edward III of England
Great x 2 Grandmother: Beatrice Aviz Duchess Viseu 2 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Afonso Aviz I Duke Braganza 6 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandmother: Isabella of Braganza 7 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Beatriz Pereira de Alvim
GrandFather: John III King Portugal 4 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: Ferdinand I King Aragon 6 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandfather: John II King Aragon 7 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Eleanor of Alberquerque Queen Consort Aragon 6 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 2 Grandfather: Ferdinand II King Aragon 8 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandfather: Fadrique Enríquez Count Melgar Count Rueda 7 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandmother: Juana Enríquez Queen Consort Aragon 8 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Mariana Fernández Countess Melgar
Great x 1 Grandmother: Maria Trastámara Queen Consort Portugal 3 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Henry III King Castile 6 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandfather: John II King Castile Great Grand Son of King Edward III of England
Great x 4 Grandmother: Catherine of Lancaster Queen Consort Castile Grand Daughter of King Edward III of England
Great x 2 Grandmother: Isabella Queen Castile 2 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Prince John Aviz Constable Portugal Great Grand Son of King Edward III of England
Great x 3 Grandmother: Isabella Aviz Queen Consort Castile 2 x Great Grand Daughter of King Edward III of England
Great x 4 Grandmother: Isabella of Braganza 7 x Great Grand Daughter of King Henry "Curtmantle" II of England
Father: John Manuel Aviz Prince Portugal 5 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: Ernest "The Iron" Habsburg I Duke Austria
Great x 3 Grandfather: Frederick "Peaceful or Fat" Habsburg III Holy Roman Emperor
Great x 4 Grandmother: Cymburgis Masovia Duchess Austria
Great x 2 Grandfather: Maximilian Habsburg I Holy Roman Emperor 3 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: Edward "The Philosopher" I King Portugal Great Grand Son of King Edward III of England
Great x 3 Grandmother: Eleanor Aviz Holy Roman Empress 2 x Great Grand Daughter of King Edward III of England
Great x 4 Grandmother: Eleanor Trastámara Queen Consort Portugal 7 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 1 Grandfather: Philip "Handsome Fair" King Castile 4 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: Philip "Good" Valois III Duke Burgundy 4 x Great Grand Son of King Edward I of England
Great x 3 Grandfather: Charles "Bold" Valois Duke Burgundy 2 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Isabella Aviz Duchess Burgundy Great Grand Daughter of King Edward III of England
Great x 2 Grandmother: Mary Valois Duchess Burgundy 3 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Charles Bourbon I Duke Bourbon 5 x Great Grand Son of King Henry III of England
Great x 3 Grandmother: Isabella Bourbon 5 x Great Grand Daughter of King Edward I of England
Great x 4 Grandmother: Agnes Valois Duchess Bourbon 4 x Great Grand Daughter of King Edward I of England
GrandMother: Catherine of Austria Queen Consort Portugal 4 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Ferdinand I King Aragon 6 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandfather: John II King Aragon 7 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Eleanor of Alberquerque Queen Consort Aragon 6 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 2 Grandfather: Ferdinand II King Aragon 8 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandfather: Fadrique Enríquez Count Melgar Count Rueda 7 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandmother: Juana Enríquez Queen Consort Aragon 8 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Mariana Fernández Countess Melgar
Great x 1 Grandmother: Joanna "The Mad" Trastámara Queen Castile 3 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Henry III King Castile 6 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandfather: John II King Castile Great Grand Son of King Edward III of England
Great x 4 Grandmother: Catherine of Lancaster Queen Consort Castile Grand Daughter of King Edward III of England
Great x 2 Grandmother: Isabella Queen Castile 2 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Prince John Aviz Constable Portugal Great Grand Son of King Edward III of England
Great x 3 Grandmother: Isabella Aviz Queen Consort Castile 2 x Great Grand Daughter of King Edward III of England
Great x 4 Grandmother: Isabella of Braganza 7 x Great Grand Daughter of King Henry "Curtmantle" II of England
Sebastian King Portugal 6 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: Ernest "The Iron" Habsburg I Duke Austria
Great x 3 Grandfather: Frederick "Peaceful or Fat" Habsburg III Holy Roman Emperor
Great x 4 Grandmother: Cymburgis Masovia Duchess Austria
Great x 2 Grandfather: Maximilian Habsburg I Holy Roman Emperor 3 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: Edward "The Philosopher" I King Portugal Great Grand Son of King Edward III of England
Great x 3 Grandmother: Eleanor Aviz Holy Roman Empress 2 x Great Grand Daughter of King Edward III of England
Great x 4 Grandmother: Eleanor Trastámara Queen Consort Portugal 7 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 1 Grandfather: Philip "Handsome Fair" King Castile 4 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: Philip "Good" Valois III Duke Burgundy 4 x Great Grand Son of King Edward I of England
Great x 3 Grandfather: Charles "Bold" Valois Duke Burgundy 2 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Isabella Aviz Duchess Burgundy Great Grand Daughter of King Edward III of England
Great x 2 Grandmother: Mary Valois Duchess Burgundy 3 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Charles Bourbon I Duke Bourbon 5 x Great Grand Son of King Henry III of England
Great x 3 Grandmother: Isabella Bourbon 5 x Great Grand Daughter of King Edward I of England
Great x 4 Grandmother: Agnes Valois Duchess Bourbon 4 x Great Grand Daughter of King Edward I of England
GrandFather: Charles V Holy Roman Emperor 4 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: Ferdinand I King Aragon 6 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandfather: John II King Aragon 7 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Eleanor of Alberquerque Queen Consort Aragon 6 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 2 Grandfather: Ferdinand II King Aragon 8 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandfather: Fadrique Enríquez Count Melgar Count Rueda 7 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandmother: Juana Enríquez Queen Consort Aragon 8 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Mariana Fernández Countess Melgar
Great x 1 Grandmother: Joanna "The Mad" Trastámara Queen Castile 3 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Henry III King Castile 6 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandfather: John II King Castile Great Grand Son of King Edward III of England
Great x 4 Grandmother: Catherine of Lancaster Queen Consort Castile Grand Daughter of King Edward III of England
Great x 2 Grandmother: Isabella Queen Castile 2 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Prince John Aviz Constable Portugal Great Grand Son of King Edward III of England
Great x 3 Grandmother: Isabella Aviz Queen Consort Castile 2 x Great Grand Daughter of King Edward III of England
Great x 4 Grandmother: Isabella of Braganza 7 x Great Grand Daughter of King Henry "Curtmantle" II of England
Mother: Joanna of Austria Princess Portugal 5 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: King John I of Portugal 5 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandfather: Edward "The Philosopher" I King Portugal Great Grand Son of King Edward III of England
Great x 4 Grandmother: Philippa of Lancaster Queen Consort Portugal Grand Daughter of King Edward III of England
Great x 2 Grandfather: Ferdinand Aviz 2nd Duke Viseu 2 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: Ferdinand I King Aragon 6 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandmother: Eleanor Trastámara Queen Consort Portugal 7 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Eleanor of Alberquerque Queen Consort Aragon 6 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 1 Grandfather: Manuel "Fortunate" I King Portugal 3 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: King John I of Portugal 5 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandfather: Prince John Aviz Constable Portugal Great Grand Son of King Edward III of England
Great x 4 Grandmother: Philippa of Lancaster Queen Consort Portugal Grand Daughter of King Edward III of England
Great x 2 Grandmother: Beatrice Aviz Duchess Viseu 2 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Afonso Aviz I Duke Braganza 6 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandmother: Isabella of Braganza 7 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Beatriz Pereira de Alvim
GrandMother: Isabel Aviz Queen Consort Spain 4 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Ferdinand I King Aragon 6 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandfather: John II King Aragon 7 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Eleanor of Alberquerque Queen Consort Aragon 6 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 2 Grandfather: Ferdinand II King Aragon 8 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandfather: Fadrique Enríquez Count Melgar Count Rueda 7 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandmother: Juana Enríquez Queen Consort Aragon 8 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Mariana Fernández Countess Melgar
Great x 1 Grandmother: Maria Trastámara Queen Consort Portugal 3 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Henry III King Castile 6 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandfather: John II King Castile Great Grand Son of King Edward III of England
Great x 4 Grandmother: Catherine of Lancaster Queen Consort Castile Grand Daughter of King Edward III of England
Great x 2 Grandmother: Isabella Queen Castile 2 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Prince John Aviz Constable Portugal Great Grand Son of King Edward III of England
Great x 3 Grandmother: Isabella Aviz Queen Consort Castile 2 x Great Grand Daughter of King Edward III of England
Great x 4 Grandmother: Isabella of Braganza 7 x Great Grand Daughter of King Henry "Curtmantle" II of England