Paternal Family Tree: Habsburg
Maternal Family Tree: Leonor de Alvim
1554 Marriage of Queen Mary with Philip II of Spain
1559 Henry II of France Dies Francis and Mary "Queen of Scots" Succeeds
Diego Prince of Asturias was created King Asturias.
On 12th November 1543 [his father] Philip "The Prudent" II King Spain [aged 16] and Maria Aviz [aged 16] were married at Salamanca [Map]. She the daughter of John III King Portugal [aged 41] and Catherine of Austria Queen Consort Portugal [aged 36]. He the son of [his grandfather] Charles V Holy Roman Emperor [aged 43] and [his grandmother] Isabel Aviz Queen Consort Spain. 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 25th July 1554 [his father] Prince Philip of Spain [aged 27] and Queen Mary [aged 38] were married by Bishop Stephen Gardiner [aged 71] at Winchester Cathedral [Map]. She the daughter of King Henry VIII of England and Ireland and Catherine of Aragon Queen Consort England. He the son of [his grandfather] Charles V Holy Roman Emperor [aged 54] and [his grandmother] Isabel Aviz Queen Consort Spain. They were first cousin once removed. He a great x 5 grandson of King Edward III of England.
John Gage [aged 74] bore the queen's train.
Magdalen Dacre Viscountess Montague [aged 16] took part in the Bridal Procession.
On 20th July 1559 [his father] Philip "The Prudent" II King Spain [aged 32] and Elizabeth Valois Queen Consort Spain [aged 14] were married. She by marriage Queen Consort Spain. She the daughter of King Henry II of France [deceased] and Catherine Medici Queen Consort France [aged 40]. He the son of [his grandfather] Charles V Holy Roman Emperor and [his grandmother] Isabel Aviz Queen Consort Spain. They were fourth cousins. He a great x 5 grandson of King Edward III of England.
In 1570 [his father] Philip "The Prudent" II King Spain [aged 42] and [his mother] Anna of Austria Queen Consort Spain [aged 20] were married. She by marriage Queen Consort Spain. The difference in their ages was 22 years. She the daughter of [his grandfather] Maximilian Habsburg Spain II Holy Roman Emperor [aged 42] and [his aunt] Maria of Spain Holy Roman Empress [aged 41]. He the son of Charles V Holy Roman Emperor and Isabel Aviz Queen Consort Spain. They were uncle and niece. He a great x 5 grandson of King Edward III of England.
On 15th August 1575 Diego Prince of Asturias was born to Philip "The Prudent" II King Spain [aged 48] and Anna of Austria Queen Consort Spain [aged 25]. Coefficient of inbreeding 21.27%. He died aged seven in 1582.
On 18th October 1578 [his brother] Ferdinand King Asturias [aged 6] died.
On 31st January 1580 Henrique Aviz Cardinal King Portugal [aged 68] died bringing to an end the House of Aviz. He was succeeded by [his father] Philip "The Prudent" II King Spain [aged 52] who was elected successor in 1581 following a military invasion of Portugal in Nov 1580.
On 26th October 1580 [his mother] Anna of Austria Queen Consort Spain [aged 30] died.
On 21st November 1582 Diego Prince of Asturias [aged 7] died.
Kings Wessex: Great x 16 Grand Son of King Edmund "Ironside" I of England
Kings Gwynedd: Great x 15 Grand Son of Owain "Great" King Gwynedd
Kings Seisyllwg: Great x 21 Grand Son of Hywel "Dda aka Good" King Seisyllwg King Deheubarth
Kings Powys: Great x 16 Grand Son of Maredudd ap Bleddyn King Powys
Kings Godwinson: Great x 15 Grand Son of King Harold II of England
Kings England: Great x 6 Grand Son of King Edward III of England
Kings Scotland: Great x 14 Grand Son of King Malcolm III of Scotland
Kings France: Great x 7 Grand Son of King John "The Good" II of France
Kings Duke Aquitaine: Great x 20 Grand Son of Ranulf I Duke Aquitaine
Kings Spain: Son of Philip "The Prudent" II King Spain
Great x 4 Grandfather: Ernest "The Iron" Habsburg I Duke Austria 15 x Great Grandson of King Alfred "The Great" of Wessex
Great x 3 Grandfather: Frederick "Peaceful or Fat" Habsburg III Holy Roman Emperor 16 x Great Grandson of King Alfred "The Great" of Wessex
Great x 4 Grandmother: Cymburgis Masovia Duchess Austria
Great x 2 Grandfather: Maximilian Habsburg I Holy Roman Emperor 3 x Great Grandson of King Edward III of England
Great x 4 Grandfather: Edward "The Philosopher" I King Portugal 
Great Grandson of King Edward III of England
Great x 3 Grandmother: Eleanor Aviz Holy Roman Empress 2 x Great Granddaughter of King Edward III of England
Great x 4 Grandmother: Eleanor Trastámara Queen Consort Portugal 
5 x Great Granddaughter of King Louis IX of France
Great x 1 Grandfather: Philip "Handsome Fair" King Castile 4 x Great Grandson of King Edward III of England
Great x 4 Grandfather: Philip "Good" Valois III Duke Burgundy 
Great Grandson of King John "The Good" II of France
Great x 3 Grandfather: Charles "Bold" Valois Duke Burgundy 2 x Great Grandson of King John "The Good" II of France
Great x 4 Grandmother: Isabella Aviz Duchess Burgundy Great Granddaughter of King Edward III of England
Great x 2 Grandmother: Mary Valois Duchess Burgundy 3 x Great Granddaughter of King John "The Good" II of France
Great x 4 Grandfather: Charles Bourbon I Duke Bourbon Great Grandson of King John "The Good" II of France
Great x 3 Grandmother: Isabella Bourbon 2 x Great Granddaughter of King John "The Good" II of France
Great x 4 Grandmother: Agnes Valois Duchess Bourbon Great Granddaughter of King John "The Good" II of France
Grandfather: Charles V Holy Roman Emperor -2 x Great Grandson of Charles V Holy Roman Emperor
Great x 4 Grandfather: Ferdinand I King Aragon 4 x Great Grandson of King Louis IX of France
Great x 3 Grandfather: John II King Aragon -2 x Great Grandson of John II King Aragon
Great x 4 Grandmother: Eleanor of Alberquerque Queen Consort Aragon 6 x Great Granddaughter of Alfonso II King Aragon
Great x 2 Grandfather: Ferdinand II King Aragon son of John II King Aragon
Great x 4 Grandfather: Fadrique Enríquez Count Melgar Count Rueda 7 x Great Grandson of Alfonso II King Aragon
Great x 3 Grandmother: Juana Enríquez Queen Consort Aragon 8 x Great Granddaughter of Alfonso II King Aragon
Great x 4 Grandmother: Mariana Fernández Countess Melgar
Great x 1 Grandmother: Joanna "The Mad" Trastámara Queen Castile Granddaughter of John II King Aragon
Great x 4 Grandfather: Henry III King Castile 4 x Great Grandson of King Louis IX of France
Great x 3 Grandfather: John II King Castile Great Grandson of King Edward III of England
Great x 4 Grandmother: Catherine of Lancaster Queen Consort Castile 
Granddaughter of King Edward III of England
Great x 2 Grandmother: Isabella Queen Castile 2 x Great Granddaughter of King Edward III of England
Great x 4 Grandfather: Prince John Aviz Constable Portugal Great Grandson of King Edward III of England
Great x 3 Grandmother: Isabella Aviz Queen Consort Castile 2 x Great Granddaughter of King Edward III of England
Great x 4 Grandmother: Isabella of Braganza 7 x Great Granddaughter of King Henry "Curtmantle" II of England
father: Philip "The Prudent" II King Spain son of Charles V Holy Roman Emperor
Great x 4 Grandfather: King John I of Portugal 5 x Great Grandson of King Henry "Curtmantle" II of England
Great x 3 Grandfather: Edward "The Philosopher" I King Portugal Great Grandson of King Edward III of England
Great x 4 Grandmother: Philippa of Lancaster Queen Consort Portugal Granddaughter of King Edward III of England
Great x 2 Grandfather: Ferdinand Aviz 2nd Duke Viseu 2 x Great Grandson of King Edward III of England
Great x 4 Grandfather: Ferdinand I King Aragon 4 x Great Grandson of King Louis IX of France
Great x 3 Grandmother: Eleanor Trastámara Queen Consort Portugal 5 x Great Granddaughter of King Louis IX of France
Great x 4 Grandmother: Eleanor of Alberquerque Queen Consort Aragon 6 x Great Granddaughter of Alfonso II King Aragon
Great x 1 Grandfather: Manuel "Fortunate" I King Portugal 3 x Great Grandson of King Edward III of England
Great x 4 Grandfather: King John I of Portugal 5 x Great Grandson of King Henry "Curtmantle" II of England
Great x 3 Grandfather: Prince John Aviz Constable Portugal Great Grandson of King Edward III of England
Great x 4 Grandmother: Philippa of Lancaster Queen Consort Portugal Granddaughter of King Edward III of England
Great x 2 Grandmother: Beatrice Aviz Duchess Viseu 2 x Great Granddaughter of King Edward III of England
Great x 4 Grandfather: Afonso Aviz I Duke Braganza 6 x Great Grandson of King Henry "Curtmantle" II of England
Great x 3 Grandmother: Isabella of Braganza 7 x Great Granddaughter of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Beatriz Pereira de Alvim
Grandmother: Isabel Aviz Queen Consort Spain Great Granddaughter of John II King Aragon
Great x 4 Grandfather: Ferdinand I King Aragon 4 x Great Grandson of King Louis IX of France
Great x 3 Grandfather: John II King Aragon -2 x Great Grandson of John II King Aragon
Great x 4 Grandmother: Eleanor of Alberquerque Queen Consort Aragon 6 x Great Granddaughter of Alfonso II King Aragon
Great x 2 Grandfather: Ferdinand II King Aragon son of John II King Aragon
Great x 4 Grandfather: Fadrique Enríquez Count Melgar Count Rueda 7 x Great Grandson of Alfonso II King Aragon
Great x 3 Grandmother: Juana Enríquez Queen Consort Aragon 8 x Great Granddaughter of Alfonso II King Aragon
Great x 4 Grandmother: Mariana Fernández Countess Melgar
Great x 1 Grandmother: Maria Trastámara Queen Consort Portugal Granddaughter of John II King Aragon
Great x 4 Grandfather: Henry III King Castile 4 x Great Grandson of King Louis IX of France
Great x 3 Grandfather: John II King Castile Great Grandson of King Edward III of England
Great x 4 Grandmother: Catherine of Lancaster Queen Consort Castile Granddaughter of King Edward III of England
Great x 2 Grandmother: Isabella Queen Castile 2 x Great Granddaughter of King Edward III of England
Great x 4 Grandfather: Prince John Aviz Constable Portugal Great Grandson of King Edward III of England
Great x 3 Grandmother: Isabella Aviz Queen Consort Castile 2 x Great Granddaughter of King Edward III of England
Great x 4 Grandmother: Isabella of Braganza 7 x Great Granddaughter of King Henry "Curtmantle" II of England
Diego Prince of Asturias son of Philip "The Prudent" II King Spain
Great x 4 Grandfather: Frederick "Peaceful or Fat" Habsburg III Holy Roman Emperor 16 x Great Grandson of King Alfred "The Great" of Wessex
Great x 3 Grandfather: Maximilian Habsburg I Holy Roman Emperor 3 x Great Grandson of King Edward III of England
Great x 4 Grandmother: Eleanor Aviz Holy Roman Empress 2 x Great Granddaughter of King Edward III of England
Great x 2 Grandfather: Philip "Handsome Fair" King Castile 4 x Great Grandson of King Edward III of England
Great x 4 Grandfather: Charles "Bold" Valois Duke Burgundy 2 x Great Grandson of King John "The Good" II of France
Great x 3 Grandmother: Mary Valois Duchess Burgundy 3 x Great Granddaughter of King John "The Good" II of France
Great x 4 Grandmother: Isabella Bourbon 2 x Great Granddaughter of King John "The Good" II of France
Great x 1 Grandfather: Ferdinand I Holy Roman Emperor Great Grandson of John II King Aragon
Great x 4 Grandfather: John II King Aragon -2 x Great Grandson of John II King Aragon
Great x 3 Grandfather: Ferdinand II King Aragon son of John II King Aragon
Great x 4 Grandmother: Juana Enríquez Queen Consort Aragon 8 x Great Granddaughter of Alfonso II King Aragon
Great x 2 Grandmother: Joanna "The Mad" Trastámara Queen Castile Granddaughter of John II King Aragon
Great x 4 Grandfather: John II King Castile Great Grandson of King Edward III of England
Great x 3 Grandmother: Isabella Queen Castile 2 x Great Granddaughter of King Edward III of England
Great x 4 Grandmother: Isabella Aviz Queen Consort Castile 2 x Great Granddaughter of King Edward III of England
Grandfather: Maximilian Habsburg Spain II Holy Roman Emperor 2 x Great Grandson of John II King Aragon
Great x 4 Grandfather: Władysław II Jagiełło
Great x 3 Grandfather: Casimir IV King Poland
Great x 4 Grandmother: Sophia of Halshany
Great x 2 Grandfather: Vladislaus II King Hungary 6 x Great Grandson of King Philip III of France
Great x 4 Grandfather: Albert Habsburg V Duke Austria 4 x Great Grandson of King Philip III of France
Great x 3 Grandmother: Elisabeth Habsburg Queen Consort Poland 5 x Great Granddaughter of King Philip III of France
Great x 4 Grandmother: Elizabeth Luxemburg Duchess Austria 
9 x Great Granddaughter of King William "Conqueror" I of England
Great x 1 Grandmother: Anne Jagiellon 2 x Great Granddaughter of John II King Aragon
Great x 4 Grandfather: John Foix 1st Earl Kendal 5 x Great Grandson of King John "The Good" II of France
Great x 3 Grandfather: Gaston de Foix 2nd Earl Kendal 6 x Great Grandson of King John "The Good" II of France
Great x 4 Grandmother: Margaret Kerdeston Countess Foix 5 x Great Granddaughter of King Edward I of England
Great x 2 Grandmother: Anna Foix Queen Consort of Hungary and Bohemia Great Granddaughter of John II King Aragon
Great x 4 Grandfather: Gaston IV Count Foix
Great x 3 Grandmother: Catherine of Foix Countess Kendal Granddaughter of John II King Aragon
Great x 4 Grandmother: Eleanor Trastámara Queen Consort Navarre daughter of John II King Aragon
mother: Anna of Austria Queen Consort Spain daughter of Maximilian Habsburg Spain II Holy Roman Emperor
Great x 4 Grandfather: Frederick "Peaceful or Fat" Habsburg III Holy Roman Emperor 16 x Great Grandson of King Alfred "The Great" of Wessex
Great x 3 Grandfather: Maximilian Habsburg I Holy Roman Emperor 3 x Great Grandson of King Edward III of England
Great x 4 Grandmother: Eleanor Aviz Holy Roman Empress 2 x Great Granddaughter of King Edward III of England
Great x 2 Grandfather: Philip "Handsome Fair" King Castile 4 x Great Grandson of King Edward III of England
Great x 4 Grandfather: Charles "Bold" Valois Duke Burgundy 2 x Great Grandson of King John "The Good" II of France
Great x 3 Grandmother: Mary Valois Duchess Burgundy 3 x Great Granddaughter of King John "The Good" II of France
Great x 4 Grandmother: Isabella Bourbon 2 x Great Granddaughter of King John "The Good" II of France
Great x 1 Grandfather: Charles V Holy Roman Emperor -2 x Great Grandson of Charles V Holy Roman Emperor
Great x 4 Grandfather: John II King Aragon -2 x Great Grandson of John II King Aragon
Great x 3 Grandfather: Ferdinand II King Aragon son of John II King Aragon
Great x 4 Grandmother: Juana Enríquez Queen Consort Aragon 8 x Great Granddaughter of Alfonso II King Aragon
Great x 2 Grandmother: Joanna "The Mad" Trastámara Queen Castile Granddaughter of John II King Aragon
Great x 4 Grandfather: John II King Castile Great Grandson of King Edward III of England
Great x 3 Grandmother: Isabella Queen Castile 2 x Great Granddaughter of King Edward III of England
Great x 4 Grandmother: Isabella Aviz Queen Consort Castile 2 x Great Granddaughter of King Edward III of England
Grandmother: Maria of Spain Holy Roman Empress daughter of Charles V Holy Roman Emperor
Great x 4 Grandfather: Edward "The Philosopher" I King Portugal Great Grandson of King Edward III of England
Great x 3 Grandfather: Ferdinand Aviz 2nd Duke Viseu 2 x Great Grandson of King Edward III of England
Great x 4 Grandmother: Eleanor Trastámara Queen Consort Portugal 5 x Great Granddaughter of King Louis IX of France
Great x 2 Grandfather: Manuel "Fortunate" I King Portugal 3 x Great Grandson of King Edward III of England
Great x 4 Grandfather: Prince John Aviz Constable Portugal Great Grandson of King Edward III of England
Great x 3 Grandmother: Beatrice Aviz Duchess Viseu 2 x Great Granddaughter of King Edward III of England
Great x 4 Grandmother: Isabella of Braganza 7 x Great Granddaughter of King Henry "Curtmantle" II of England
Great x 1 Grandmother: Isabel Aviz Queen Consort Spain Great Granddaughter of John II King Aragon
Great x 4 Grandfather: John II King Aragon -2 x Great Grandson of John II King Aragon
Great x 3 Grandfather: Ferdinand II King Aragon son of John II King Aragon
Great x 4 Grandmother: Juana Enríquez Queen Consort Aragon 8 x Great Granddaughter of Alfonso II King Aragon
Great x 2 Grandmother: Maria Trastámara Queen Consort Portugal Granddaughter of John II King Aragon
Great x 4 Grandfather: John II King Castile Great Grandson of King Edward III of England
Great x 3 Grandmother: Isabella Queen Castile 2 x Great Granddaughter of King Edward III of England
Great x 4 Grandmother: Isabella Aviz Queen Consort Castile 2 x Great Granddaughter of King Edward III of England