Paternal Family Tree: Anjou aka Plantagenet
Maternal Family Tree: María González Henestrosa Lady Villagera -1356
On 11th July 1372 [his father] Edmund of Langley 1st Duke of York [aged 31] and [his mother] Isabella of Castile Duchess York [aged 17] were married at Wallingford, Oxfordshire [Map]. She by marriage Countess Cambridge. She being the younger sister of [his aunt] Constance [aged 18] who had married Edmund's older brother [his uncle] John of Gaunt 1st Duke Lancaster [aged 32] a year before. An example of Marriage of Two Sets of Siblings. She the illegitmate daughter of [his grandfather] Peter "Cruel" I King Castile and [his grandmother] Maria Padilla. He the son of King Edward III of England [aged 59] and Philippa of Hainaut Queen Consort England. They were half third cousin twice removed.
On 20th July 1385 Richard of Conisbrough 1st Earl Cambridge was born to Edmund of Langley 1st Duke of York [aged 44] and Isabella of Castile Duchess York [aged 30] at Conisbrough Castle [Map]. Some historians suggest the father was John Holland 1st Duke Exeter [aged 33] with whom Isabella of Castile Duchess York was suspected of having an affair since 1. Richard received no lands from his father and was not mentioned either in his father's will nor his brother's will, 2. the age gap, around ten years, between Richard and his older siblings. He a grandson of King Edward III of England.
On 6th August 1385 [his father] Edmund of Langley 1st Duke of York [aged 44] was created 1st Duke York by King Richard II of England [aged 18]. [his mother] Isabella of Castile Duchess York [aged 30] by marriage Duchess York.
[his uncle] Thomas of Woodstock 1st Duke of Gloucester [aged 30] was created 1st Duke Albemarle, and 1st Duke Gloucester. Eleanor Bohun Duchess Gloucester [aged 19] by marriage Duchess Albemarle and Duchess Gloucester.
Michael de la Pole 1st Earl Suffolk [aged 55] was created 1st Earl Suffolk. Katherine Wingfield Countess Suffolk [aged 45] by marriage Countess Suffolk.
On 23rd December 1392 [his mother] Isabella of Castile Duchess York [aged 37] died. She was buried at King's Langley Priory, Hertfordshire [Map]. She the wife of Edmund of Langley 1st Duke of York [aged 51]. Isabella had travelled to England with her sister Constance of Castile Duchess of Lancaster [aged 38] who had married Edmund's elder brother John of Gaunt 1st Duke Lancaster [aged 52]. Isabella and Edmund's marriage was not, apparently, a happy one. She is known to have had an affair with John Holland 1st Duke Exeter [aged 40] who may have been the father of Richard of Conisbrough 1st Earl Cambridge [aged 7] progenitor of the House of York.
On 4th November 1393 [his father] Edmund of Langley 1st Duke of York [aged 52] and [his step-mother] Joan Holland Duchess York [aged 13] were married. She by marriage Duchess York. The difference in their ages was 38 years. She the daughter of Thomas Holland 2nd Earl Kent [aged 43] and Alice Fitzalan Countess Kent [aged 43]. He the son of [his grandfather] King Edward III of England and [his grandmother] Philippa of Hainaut Queen Consort England. They were half second cousin once removed. She a great x 2 granddaughter of King Edward I of England.
On 29th September 1397 [his brother-in-law] Thomas Despencer 1st Earl Gloucester [aged 24] was created 1st Earl Gloucester. [his sister] Constance York Countess Gloucester [aged 23] by marriage Countess Gloucester.
Before 7th October 1398 [his brother] Edward 2nd Duke of York 1st Duke Albemarle [aged 25] and [his sister-in-law] Philippa Mohun Duchess York [aged 31] were married. He the son of [his father] Edmund of Langley 1st Duke of York [aged 57] and [his mother] Isabella of Castile Duchess York.
On 1st August 1402 [his father] Edmund of Langley 1st Duke of York [aged 61] died at King's Langley, Hertfordshire [Map]. His son [his brother] Edward [aged 29] succeeded 2nd Duke York, 2nd Earl Cambridge and inherited his estates which included Conisbrough Castle [Map]. [his sister-in-law] Philippa Mohun Duchess York [aged 35] by marriage Duchess York.
In May 1406 Richard of Conisbrough 1st Earl Cambridge [aged 20] and Anne Mortimer [aged 15] were married. The marriage apparently took place in secret possibly because she was a descendant of King Edward III of England although she wasn't at the time Heir to the Throne of England although their issue would become so. She died five years later. The suspected false paternity has no effect on the claim of the House of York since it is Richard's wife Ann Mortimer who passes claim to her children. She the daughter of Roger Mortimer 4th Earl March 3rd Earl of Ulster and Eleanor Holland Countess March and Ulster. He the son of Edmund of Langley 1st Duke of York and Isabella of Castile Duchess York. They were first cousin twice removed. He a grandson of King Edward III of England. She a great x 2 granddaughter of King Edward III of England.
Before 24th July 1406 John Neville 6th Baron Latimer of Corby [aged 24] and [his future wife] Maud Clifford Countess Cambridge [aged 17] were married. She by marriage Baroness Latimer of Corby. They were second cousin twice removed. He a great x 5 grandson of King Henry "Curtmantle" II of England. She a great x 4 granddaughter of King Edward I of England.
In 1409 [his daughter] Isabel York Countess Eu and Essex was born to Richard of Conisbrough 1st Earl Cambridge [aged 23] and [his wife] Anne Mortimer [aged 18]. She a great granddaughter of King Edward III of England. Coefficient of inbreeding 2.28%. She married 1. 18th February 1413 her fourth cousin Thomas Grey of Heton and had issue 2. before 25th April 1426 her second cousin Henry Bourchier 2nd Count of Eu 1st Earl Essex, son of William Bourchier 1st Count of Eu and Anne of Gloucester Plantagenet Countess Eu and Stafford, and had issue.
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Around 21st September 1411 [his wife] Anne Mortimer [aged 20] died from childbirth.
On 21st September 1411 [his son] Richard Plantagenet 3rd Duke of York was born to Richard of Conisbrough 1st Earl Cambridge [aged 26] and [his wife] Anne Mortimer [aged 20]. His mother died shortly afterwards. He a great grandson of King Edward III of England. Coefficient of inbreeding 2.28%. He married October 1429 his second cousin Cecily "Rose of Raby" Neville Duchess York, daughter of Ralph Neville 1st Earl of Westmoreland and Joan Beaufort Countess of Westmoreland, and had issue.
After 21st September 1411 Richard of Conisbrough 1st Earl Cambridge [aged 26] and Maud Clifford Countess Cambridge [aged 22] were married. He the son of Edmund of Langley 1st Duke of York and Isabella of Castile Duchess York. They were third cousin twice removed. He a grandson of King Edward III of England. She a great x 4 granddaughter of King Edward I of England.
On 18th February 1413 [his son-in-law] Thomas Grey of Heton [aged 9] and Isabel York Countess Eu and Essex [aged 4] were married. She the daughter of Richard of Conisbrough 1st Earl Cambridge [aged 27] and Anne Mortimer. They were fourth cousins. He a great x 4 grandson of King Edward I of England. She a great granddaughter of King Edward III of England.
Before 1414 John Neville 6th Baron Latimer of Corby [aged 31] and [his wife] Maud Clifford Countess Cambridge [aged 24] were divorced.
In 1414 Richard of Conisbrough 1st Earl Cambridge [aged 28] was created 1st Earl Cambridge. [his wife] Maud Clifford Countess Cambridge [aged 25] by marriage Countess Cambridge.
In 1414 Edward 2nd Duke of York 1st Duke Albemarle [aged 41]resigned the Earldom of Cambridge. It appears he took this action so that his brother Richard of Conisbrough 1st Earl Cambridge [aged 28] could be created Earl Cambridge (of the third creation) later that year.
On 31st July 1415, when King Henry V of England [aged 28] was in Portchester Castle, Hampshire [Map] preparing to invade France, [his former brother-in-law] Edmund Mortimer 5th Earl March 7th Earl of Ulster [aged 23] revealed the Southampton Plot to him. Henry Scrope 3rd Baron Scrope of Masham [aged 42], Thomas Grey of Werke and Heaton [aged 30], and Richard of Conisbrough 1st Earl Cambridge [aged 30] were intending to replace King Henry V of England with Edmund Mortimer 5th Earl March 7th Earl of Ulster as King of England based on Edmund Mortimer 5th Earl March 7th Earl of Ulster having a better claim to the throne being descended from Edward III's second son [his uncle] Lionel of Antwerp 1st Duke of Clarence whereas King Henry V of England was descended from the third son John of Gaunt 1st Duke Lancaster.
Robert Willoughby 6th Baron Willoughby [aged 30], Richard de Vere 11th Earl of Oxford [aged 29], Thomas Montagu 1st Count Perche 4th Earl Salisbury [aged 27] and Thomas Camoys 1st Baron Camoys [aged 64] sat in judgement.
On 5th August 1415 two executions of those involved in the Southampton Plot took place at the North Gate aka Bargate [Map]:
Richard of Conisbrough 1st Earl Cambridge [aged 30] was beheaded. His son Richard [aged 3] succeeded 2nd Earl Cambridge.
Henry Scrope 3rd Baron Scrope of Masham [aged 42] was beheaded. His brother John [aged 27] succeeded 4th Baron Scrope of Masham.
Chronicle of Gregory. July 1415. And he roode forthe his way tylle he cam to Hampton, and there he mosteryd his mayne. And there were certayne personys that had caste to slayne our King, but God that knew alle trougthe, he sende warnynge to our kyng; and his enmys, the whiche namys folowythe aftyr, Syr Richarde Camborowe [aged 29]13, Erle of Cambryge, Syr Harry, lord Scrope [aged 42], ande Syr Thomas Gray [aged 30], knyght, with moo of her assent, [th]e whiche personys were a-restyde and put in the preson, ande do to dethe.
Note 13. Camborowe. Conysborughe in Vit.
On 26th August 1466 [his former wife] Maud Clifford Countess Cambridge [aged 77] died.
[his son] Henry York was born to Richard of Conisbrough 1st Earl Cambridge and Anne Mortimer. He a great grandson of King Edward III of England. Coefficient of inbreeding 2.28%.
Kings Wessex: Great x 10 Grand Son of King Edmund "Ironside" I of England
Kings Godwinson: Great x 10 Grand Son of King Harold II of England
Kings England: Grand Son of King Edward III of England
Kings Scotland: Great x 8 Grand Son of King Malcolm III of Scotland
Kings France: Great x 2 Grand Son of King Philip IV of France
Kings Duke Aquitaine: Great x 14 Grand Son of Ranulf I Duke Aquitaine
Kings Spain: Great x 6 Grand Son of Alfonso VII King Castile VII King Leon
Great x 4 Grandfather: King John of England 
son of King Henry "Curtmantle" II of England
Great x 3 Grandfather: King Henry III of England son of King John of England
Great x 4 Grandmother: Isabella of Angoulême Queen Consort England 5 x Great Granddaughter of Hugh I King of the Franks
Great x 2 Grandfather: King Edward I of England son of King Henry III of England
Great x 4 Grandfather: Raymond IV Count Provence 
Grandson of Alfonso II King Aragon
Great x 3 Grandmother: Eleanor of Provence Queen Consort England Great Granddaughter of Alfonso II King Aragon
Great x 4 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 1 Grandfather: King Edward II of England son of King Edward I 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 Grandmother: Eleanor of Castile Queen Consort England 2 x Great Granddaughter of Alfonso VII King Castile VII King Leon
Great x 4 Grandfather: Simon Dammartin 10 x Great Grandson of Charles "Charlemagne aka Great" King of the Franks King Lombardy Holy Roman Emperor
Great x 3 Grandmother: Joan Dammartin Queen Consort Castile and Leon 2 x Great Granddaughter of Alfonso VII King Castile VII King Leon
Great x 4 Grandmother: Marie Montgomery Countess Ponthieu Great Granddaughter of Alfonso VII King Castile VII King Leon
Grandfather: King Edward III of England son of King Edward II of England
Great x 4 Grandfather: King Louis IX of France 
son of King Louis VIII of France
Great x 3 Grandfather: King Philip III of France son of King Louis IX of France
Great x 4 Grandmother: Margaret Provence Queen Consort France Great Granddaughter of Alfonso II King Aragon
Great x 2 Grandfather: King Philip IV of France son of King Philip III of France
Great x 4 Grandfather: James I King Aragon Grandson of Alfonso II King Aragon
Great x 3 Grandmother: Isabella Barcelona Queen Consort France Great Granddaughter of Alfonso II King Aragon
Great x 4 Grandmother: Violant Árpád Queen Consort Aragon 4 x Great Granddaughter of King Harold II of England
Great x 1 Grandmother: Isabella of France Queen Consort England daughter of King Philip IV of France
Great x 4 Grandfather: Theobald IV King Navarre 
Great Grandson of Alfonso VII King Castile VII King Leon
Great x 3 Grandfather: Henry I King Navarre 2 x Great Grandson of Alfonso VII King Castile VII King Leon
Great x 4 Grandmother: Margaret Bourbon Queen Consort Navarre 
Great x 2 Grandmother: Joan Blois I Queen Navarre Great Granddaughter of King Louis VIII of France
Great x 4 Grandfather: Robert Capet Count of Artois son of King Louis VIII of France
Great x 3 Grandmother: Blanche Capet Queen Navarre Granddaughter of King Louis VIII of France
Great x 4 Grandmother: Matilda Reginar Countess Saint Pol 2 x Great Granddaughter of King Stephen I England
Father: Edmund of Langley 1st Duke of York 
son of King Edward III of England
Great x 4 Grandfather: Bouchard Avesnes
Great x 3 Grandfather: John of Avesnes I Count Hainaut 4 x Great Grandson of King William "Conqueror" I of England
Great x 4 Grandmother: Margaret II Countess Flanders 3 x Great Granddaughter of King William "Conqueror" I of England
Great x 2 Grandfather: John of Avesnes II Count Hainaut II Count Holland 3 x Great Grandson of King Stephen I England
Great x 4 Grandfather: Floris Gerulfing IV Count Holland 
2 x Great Grandson of King David I of Scotland
Great x 3 Grandmother: Adelaide Gerulfing Countess Hainaut 2 x Great Granddaughter of King Stephen I England
Great x 4 Grandmother: Mathilde Reginar Countess Holland and Palatine Great Granddaughter of King Stephen I England
Great x 1 Grandfather: William of Avesnes I Count Hainaut III Count Avesnes III Count Holland II Count Zeeland 4 x Great Grandson of King Stephen I England
Great x 4 Grandfather: Waleran Luxemburg III Duke Limburg 
10 x Great Grandson of King Edward "Elder" of the Anglo Saxons
Great x 3 Grandfather: Henry "Great" Luxemburg V Count Luxemburg III Count Namur 8 x Great Grandson of King Edward "Elder" of the Anglo Saxons
Great x 4 Grandmother: Erminsende Namur Countess of Bar 7 x Great Granddaughter of King Edward "Elder" of the Anglo Saxons
Great x 2 Grandmother: Philippa Luxemburg Countess Hainaut and Holland 5 x Great Granddaughter of King William "Conqueror" I of England
Great x 4 Grandfather: Henry of Bar II Count of Bar 3 x Great Grandson of King William "Conqueror" I of England
Great x 3 Grandmother: Margaret of Bar Countess Luxemburg and Namur 4 x Great Granddaughter of King William "Conqueror" I of England
Great x 4 Grandmother: Philippa Capet Countess of Bar 5 x Great Granddaughter of Hugh I King of the Franks
Grandmother: Philippa of Hainaut Queen Consort England Great Granddaughter of King Philip III of France
Great x 4 Grandfather: King Louis IX of France son of King Louis VIII of France
Great x 3 Grandfather: King Philip III of France son of King Louis IX of France
Great x 4 Grandmother: Margaret Provence Queen Consort France Great Granddaughter of Alfonso II King Aragon
Great x 2 Grandfather: Charles Valois I Count Valois son of King Philip III of France
Great x 4 Grandfather: James I King Aragon Grandson of Alfonso II King Aragon
Great x 3 Grandmother: Isabella Barcelona Queen Consort France Great Granddaughter of Alfonso II King Aragon
Great x 4 Grandmother: Violant Árpád Queen Consort Aragon 4 x Great Granddaughter of King Harold II of England
Great x 1 Grandmother: Joan Valois Countess Zeeland Holland Avesnes and Hainaut Granddaughter of King Philip III of France
Great x 4 Grandfather: King Charles Capet of Sicily son of King Louis VIII of France
Great x 3 Grandfather: Charles II King Naples Grandson of King Louis VIII of France
Great x 4 Grandmother: Beatrice Provence Queen Consort Sicily Great Granddaughter of Alfonso II King Aragon
Great x 2 Grandmother: Margaret Capet Countess Valois Great Granddaughter of King Louis VIII of France
Great x 4 Grandfather: Stephen V of Hungary 5 x Great Grandson of King Harold II of England
Great x 3 Grandmother: Mary of Hungary Queen Consort Naples 6 x Great Granddaughter of King Harold II of England
Great x 4 Grandmother: Elizabeth Cuman
Richard of Conisbrough 1st Earl Cambridge Grandson of King Edward III 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 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: Peter "Cruel" I King Castile 5 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 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 Grandmother: Maria Burgundy Queen Consort Castile 4 x Great Granddaughter 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
Mother: Isabella of Castile Duchess York 6 x Great Granddaughter of Alfonso II King Aragon
Great x 2 Grandfather: Garcia Padilla
Great x 1 Grandfather: Juan García Padilla 1st Lord Villagera
Grandmother: Maria Padilla
Great x 2 Grandfather: Fernán González Henestrosa
Great x 1 Grandmother: María González Henestrosa Lady Villagera