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Biography of King John I of Portugal 1352-1433
Paternal Family Tree: Capet
Maternal Family Tree: Inês Castro 1325-1355
On 24 Aug 1340 [his father] Peter I King Portugal (age 20) and Constanza Manuel Queen Consort Castile (age 24) were married. She by marriage Queen Consort Portugal. He the son of [his grandfather] Alfonso "Brave" IV King Portugal (age 49) and [his grandmother] Beatrice Ivrea Queen Consort Portugal (age 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 or before 1350 [his father] Peter I King Portugal (age 29) and [his mother] Inês Castro (age 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 grandfather] Alfonso "Brave" IV King Portugal (age 58) and [his grandmother] Beatrice Ivrea Queen Consort Portugal (age 56). He a great x 4 grandson of King Henry "Curtmantle" II of England.
In 1352 King John I of Portugal was born to Peter I King Portugal (age 31) and Inês Castro (age 27) at Lisbon [Map].
On 07 Jan 1355 [his mother] Inês Castro (age 30) was murdered on the orders of her [his father] husband's (age 34) father [his grandfather] Alfonso "Brave" IV King Portugal (age 63) who didn't approve of their marriage, or relationship. He, Peter, subsequently captured two of the murderers and had them executed.
On 18 Jan 1367 [his father] Peter I King Portugal (age 46) died. His son [his half-brother] Ferdinand I King Portugal (age 21) succeeded I King Portugal.
On 10 Aug 1377 [his illegitimate son] Afonso Aviz I Duke Braganza was born illegitimately to King John I of Portugal (age 25) and Ines Peres.
In 1378 [his illegitimate daughter] Branca Aviz was born illegitimately to King John I of Portugal (age 26) and Ines Peres.
Around 1382 [his illegitimate daughter] Beatrice Aviz Duchess Exeter was born illegitimately to King John I of Portugal (age 30) and Ines Peres.
On 22 Oct 1383 [his half-brother] Ferdinand I King Portugal (age 37) died. His half brother King John I of Portugal (age 31) succeeded I King Portugal.
On 02 Feb 1387 King John I of Portugal (age 35) and Philippa of Lancaster Queen Consort Portugal (age 26) were married. She by marriage Queen Consort Portugal. She the daughter of John of Gaunt 1st Duke Lancaster (age 46) and Blanche Duchess of Lancaster. He the son of Peter I King Portugal and Inês Castro. They were half fourth cousins. He a great x 5 grandson of King Henry "Curtmantle" II of England. She a granddaughter of King Edward III of England.
On 19 Dec 1387 an army of the Lords Appellant led by the future [his brother-in-law] King Henry IV of England (age 20) prevented the forces of King Richard II of England (age 20) commanded by Robert de Vere 1st Duke Ireland (age 25) from crossing the bridge [Map] over the River Thames at Radcot in Oxfordshire. When Thomas of Woodstock 1st Duke of Gloucester (age 32) arrived with further Lord Appellant's men the King's men were encircled. The King's men attempted to force the crossing of the bridge at which time the only casualties occurred including Thomas Molyneux (age 49) who was killed by Thomas Mortimer (age 37). Around 800 men drowned in the marshes whilst trying to escape. Robert de Vere 1st Duke Ireland narrowly escaped to France.
In 1388 John Holland 1st Duke Exeter (age 36) was created 1st Earl Huntingdon. [his sister-in-law] Elizabeth Lancaster Duchess Exeter (age 24) by marriage Countess Huntingdon.
On 13 Jul 1388 [his daughter] Blanche Aviz was born to King John I of Portugal (age 36) and [his wife] Philippa of Lancaster Queen Consort Portugal (age 28). She a great granddaughter of King Edward III of England.
Before 17 Sep 1388 Henry III King Castile (age 8) and [his sister-in-law] Catherine of Lancaster Queen Consort Castile (age 15) were married at Palencia Cathedral [Map]. She by marriage Queen Consort Castile. She the daughter of [his father-in-law] John of Gaunt 1st Duke Lancaster (age 48) and Constance of Castile Duchess of Lancaster (age 34). He the son of John I King Castile (age 30) and Eleanor Barcelona Queen Consort Castile. They were half second cousins. She a granddaughter of King Edward III of England.
On 30 Jul 1390 [his son] Afonso Aviz was born to King John I of Portugal (age 38) and [his wife] Philippa of Lancaster Queen Consort Portugal (age 30). He a great grandson of King Edward III of England.
In 1391 Robert Ferrers (age 18) and [his illegitimate sister-in-law] Joan Beaufort Countess of Westmoreland (age 12) were married at Beaufort en Vallée [Map]. She the illegitmate daughter of [his father-in-law] John of Gaunt 1st Duke Lancaster (age 50) and Katherine Roet Duchess Lancaster (age 40). She a granddaughter of King Edward III of England.
On 31 Oct 1391 [his son] Edward "The Philosopher" I King Portugal was born to King John I of Portugal (age 39) and [his wife] Philippa of Lancaster Queen Consort Portugal (age 31). He a great grandson of King Edward III of England.
On 09 Dec 1392 [his son] Peter Aviz I Duke Coimbra was born to King John I of Portugal (age 40) and [his wife] Philippa of Lancaster Queen Consort Portugal (age 32). He a great grandson of King Edward III of England.
On 04 Mar 1394 [his son] Henry "The Navigator" Aviz was born to King John I of Portugal (age 42) and [his wife] Philippa of Lancaster Queen Consort Portugal (age 33). He a great grandson of King Edward III of England.
Before 29 Nov 1396 Ralph Neville 1st Earl of Westmoreland (age 32) and [his illegitimate sister-in-law] Joan Beaufort Countess of Westmoreland (age 17) were married. She by marriage Baroness Neville Raby. She the illegitmate daughter of [his father-in-law] John of Gaunt 1st Duke Lancaster (age 56) and Katherine Roet Duchess Lancaster (age 46). He a great x 5 grandson of King Henry "Curtmantle" II of England. She a granddaughter of King Edward III of England.
On 21 Feb 1397 [his daughter] Isabella Aviz Duchess Burgundy was born to King John I of Portugal (age 45) and [his wife] Philippa of Lancaster Queen Consort Portugal (age 36). She a great granddaughter of King Edward III of England.
On 27 Nov 1397 [his illegitimate brother-in-law] John Beaufort 1st Marquess Somerset and Dorset (age 24) and Margaret Holland Duchess Clarence (age 12) were married. She by marriage Countess Somerset. She the daughter of Thomas Holland 2nd Earl Kent and Alice Fitzalan Countess Kent (age 47). He the illegitmate son of [his father-in-law] John of Gaunt 1st Duke Lancaster (age 57) and Katherine Roet Duchess Lancaster (age 47). They were half third cousins. He a grandson of King Edward III of England. She a great x 2 granddaughter of King Edward I of England.
On 11 Apr 1398 [his daughter] Blanche Aviz was born to King John I of Portugal (age 46) and [his wife] Philippa of Lancaster Queen Consort Portugal (age 38). She a great granddaughter of King Edward III of England.
On 03 Feb 1399 [his father-in-law] John of Gaunt 1st Duke Lancaster (age 58) died at Leicester Castle [Map]. Katherine Roet Duchess Lancaster (age 48) was by his side. He was buried in the Choir of St Paul's Cathedral [Map] with his first wife Blanche Duchess of Lancaster. His son [his brother-in-law] King Henry IV of England (age 31) succeeded 2nd Duke Lancaster, 7th Earl of Leicester.
King Richard II of England (age 32) witheld the future Henry IV's inheritance from him giving Henry reason to return to England to claim his lands and titles.
On 13 Oct 1399 [his brother-in-law] King Henry IV of England (age 32) was crowned IV King of England at Westminster Abbey [Map] by Archbishop Thomas Fitzalan aka Arundel (age 46).
Bishop Robert Braybrooke carried the sacraments and said mass. Duke Lancaster and Earl of Leicester Merged with the Crown.
The future King Henry V of England (age 13) carried the Sword Curtana. Thomas Beauchamp 12th Earl Warwick (age 61) and/or [his illegitimate brother-in-law] John Beaufort 1st Marquess Somerset and Dorset (age 26) carried a sword wrapped in red and bound with golden straps symbolising two-fold mercy. Henry Percy 1st Earl of Northumberland (age 57) carried the Lancaster Sword.
Thomas Percy 1st Earl of Worcester (age 56) carried the Steward's baton. Thomas Erpingham (age 44) carried a Sword.
Edmund Stafford 5th Earl Stafford (age 21) was appointed Knight of the Bath. John Lancaster 1st Duke Bedford (age 10), John Arundell (age 33) and Richard Beauchamp 13th Earl Warwick (age 17) were knighted.
Archbishop Richard Scrope (age 49) attended.
Earl Derby and Earl Lancaster merged with the Crown.
On 10 Nov 1399 King Henry V of England (age 13) was created 1st Duke Lancaster by [his brother-in-law] King Henry IV of England (age 32).
In 1400 John Cornwall 1st Baron Fanhope 1st Baron Milbroke (age 36) and [his sister-in-law] Elizabeth Lancaster Duchess Exeter (age 36) were married. She the daughter of [his father-in-law] John of Gaunt 1st Duke Lancaster and Blanche Duchess of Lancaster. He a great x 3 grandson of King John of England. She a granddaughter of King Edward III of England.
On 13 Jan 1400 [his grandson-in-law] Prince John Aviz Constable Portugal was born to King John I of Portugal (age 48) and [his wife] Philippa of Lancaster Queen Consort Portugal (age 39). He a great grandson of King Edward III of England.
On 14 Feb 1400 (exact date not known) King Richard II (age 33) died at Pontefract Castle [Map] where he had been imprisoned three months before; possibly murdered, possibly starved to death. His death was a consequence of the Epiphany Rising; he was still considered a threat. His first cousin Philippa Plantagenet Countess March 5th Countess Ulster de jure Heir to the Throne of England since she was the daughter of Lionel Plantagenet 1st Duke of Clarence. She at this time had four children with her husband Edmund Mortimer 3rd Earl March, Earl Ulster. The new [his brother-in-law] King Henry IV (age 32) ignored her claim.
On 17 Feb 1400 Richard's corpse was displayed at St Paul's Cathedral [Map].
On 06 Mar 1400 Richard's remains were buried at King's Langley Priory, Hertfordshire [Map].
On 08 Nov 1400 [his illegitimate son] Afonso Aviz I Duke Braganza (age 23) and [his daughter-in-law] Beatriz Pereira de Alvim (age 20) were married. He the illegitmate son of King John I of Portugal (age 48) and Ines Peres.
On 29 Sep 1402 [his son] Ferdinand Aviz was born to King John I of Portugal (age 50) and [his wife] Philippa of Lancaster Queen Consort Portugal (age 42). He a great grandson of King Edward III of England.
On 07 Feb 1403 [his brother-in-law] King Henry IV of England (age 35) and Joanna of Navarre Queen Consort England (age 33) were married at Winchester, Hampshire [Map]. Joanna of Navarre Queen Consort England was crowned Queen Consort England. His third marriage, her second. She had eight children with her first husband but, despite ten years of marriage, none with Henry. She the daughter of Charles "Bad" II King Navarre and Joan Valois Queen Consort Navarre. He the son of [his father-in-law] John of Gaunt 1st Duke Lancaster and Blanche Duchess of Lancaster. They were third cousins. He a grandson of King Edward III of England. She a great x 4 granddaughter of King Henry III of England.
On 21 Jul 1403 [his brother-in-law] King Henry IV of England (age 36), with his son the future King Henry V of England (age 16), defeated the rebel army of Henry "Hotspur" Percy (age 39) at the Battle of Shrewsbury at the site now known as Battlefield, Shrewsbury [Map]. King Henry V of England took an arrow to the side of his face leaving him severely scarred. John Stanley (age 53) was wounded in the throat. Thomas Strickland (age 36) fought and was awarded £38 and two of the rebel Henry's horses. Richard Beauchamp 13th Earl Warwick (age 21) fought for the King. Walter Blount (age 55), the King's Standard Bearer, was killed by Archibald Douglas 1st Duke Touraine (age 31).
Thomas Wendesley (age 59) and Edmund Cockayne (age 47) were killed.
Edmund Stafford 5th Earl Stafford (age 25) was killed. His son Humphrey Stafford succeeded 6th Earl Stafford, 7th Baron Stafford.
Hugh Shirley (age 52) was killed; he was one of four knights dressed as King Henry IV of England.
Of the rebels, Henry "Hotspur" Percy, Madog Kynaston (age 43) and John Clifton were killed.
Thomas Percy 1st Earl of Worcester (age 60) was beheaded after the battle. Earl Worcester extinct.
Richard Vernon 11th Baron Shipbrook (age 48) was hanged. Baron Shipbrook forfeit.
John Rossall was killed. His sister Eleanor Rossall (age 26) inherited a half-share in the Rossall Shrewsbury [Map] estates.
John Massey (age 65) was killed.
Before 15 Feb 1404 [his illegitimate brother-in-law] Thomas Beaufort 1st Duke Exeter (age 27) and Margaret Neville Countess Dorest (age 20) were married. He the illegitmate son of [his father-in-law] John of Gaunt 1st Duke Lancaster and Katherine Roet Duchess Lancaster. He a grandson of King Edward III of England.
On 26 Nov 1405 [his son-in-law] Thomas Fitzalan 10th Earl of Surrey 12th Earl of Arundel (age 24) and [his illegitimate daughter] Beatrice Aviz Duchess Exeter (age 23) were married. [his brother-in-law] King Henry IV of England (age 38) and Joanna of Navarre Queen Consort England (age 35) were present at their wedding feast. She the illegitmate daughter of King John I of Portugal (age 53) and Ines Peres. He the son of Richard Fitzalan 9th Earl of Surrey 11th Earl of Arundel and Elizabeth Bohun Countess Arundel and Surrey. He a great x 2 grandson of King Edward I of England.
Around 1408 King John I of Portugal (age 56) was appointed 102nd Knight of the Garter by [his brother-in-law] King Henry IV of England (age 40).
On 16 Mar 1410 [his illegitimate brother-in-law] John Beaufort 1st Marquess Somerset and Dorset (age 37) died at Hospital of St Katharine's by the Tower Tower Hill [Map]. He was buried at St Michael's Chapel, Canterbury Cathedral [Map]. His son Henry Beaufort 2nd Earl Somerset (age 9) succeeded 2nd Earl Somerset.
On 05 Jul 1411 [his illegitimate brother-in-law] Thomas Beaufort 1st Duke Exeter (age 34) was created 1st Earl Dorset. Margaret Neville Countess Dorest (age 27) by marriage Countess Dorset.
In 1412 Thomas Lancaster 1st Duke of Clarence (age 23) was created 1st Duke Clarence by [his brother-in-law] King Henry IV of England (age 44). Margaret Holland Duchess Clarence (age 27) by marriage Duchess Clarence.
On 20 Mar 1413 [his brother-in-law] King Henry IV of England (age 45) died in the Jerusalem Chamber, Cheyneygates, Westminster Abbey [Map] in Westminster Abbey confirming a prophesy that he would die in Jerusalem. His son King Henry V of England (age 26) succeeded V King of England. His sons King Henry V of England and Humphrey Lancaster 1st Duke Gloucester (age 22) were present. He was buried in the Chancel of Canterbury Cathedral [Map].
In 1415 [his son-in-law] Gilbert Talbot 8th Baron Strange Blackmere 5th Baron Talbot (age 32) and [his illegitimate daughter] Beatrice Aviz Duchess Exeter (age 33) were married. She the illegitmate daughter of King John I of Portugal (age 63) and Ines Peres. He a great x 3 grandson of King Edward I of England.
On 19 Jul 1415 [his wife] Philippa of Lancaster Queen Consort Portugal (age 55) died at Sacavém.
After 19 Oct 1418, and before 1427, [his son-in-law] Thomas Fettiplace (age 35) and [his illegitimate daughter] Beatrice Aviz Duchess Exeter (age 36) were married. She the illegitmate daughter of King John I of Portugal (age 66) and Ines Peres.
In 1424 [his grandson-in-law] Prince John Aviz Constable Portugal (age 23) and [his granddaughter] Isabella of Braganza (age 21) were married. He the son of King John I of Portugal (age 72) and [his former wife] Philippa of Lancaster Queen Consort Portugal. They were uncle and niece. He a great grandson of King Edward III of England.
On 22 Sep 1428 [his son] Edward "The Philosopher" I King Portugal (age 36) and [his daughter-in-law] Eleanor Trastámara Queen Consort Portugal were married. She by marriage Queen Consort Portugal. She the daughter of Ferdinand I King Aragon and Eleanor of Alberquerque Queen Consort Aragon (age 54). He the son of King John I of Portugal (age 76) and [his former wife] Philippa of Lancaster Queen Consort Portugal. They were first cousin once removed. He a great grandson of King Edward III of England.
In 1429 [his son] Peter Aviz I Duke Coimbra (age 36) and [his daughter-in-law] Isabella Urgell were married. He the son of King John I of Portugal (age 77) and [his former wife] Philippa of Lancaster Queen Consort Portugal. He a great grandson of King Edward III of England.
On 07 Jan 1430 [his son-in-law] Philip "Good" Valois III Duke Burgundy (age 33) and [his daughter] Isabella Aviz Duchess Burgundy (age 32) were married. She by marriage Duchess Burgundy. She the daughter of King John I of Portugal (age 78) and [his former wife] Philippa of Lancaster Queen Consort Portugal. He the son of John "Fearless" Valois Duke Burgundy and Margaret Wittelsbach Duchess Burgundy. They were third cousins. He a great x 4 grandson of King Edward I of England. She a great granddaughter of King Edward III of England.
On 20 Jan 1433 [his son-in-law] John Holland 2nd Duke Exeter (age 37) and [his illegitimate daughter] Beatrice Aviz Duchess Exeter (age 51) were married. She by marriage Duchess Exeter. She the illegitmate daughter of King John I of Portugal (age 81) and Ines Peres. He the son of John Holland 1st Duke Exeter and [his former sister-in-law] Elizabeth Lancaster Duchess Exeter. He a great grandson of King Edward III of England.
On 14 Aug 1433 King John I of Portugal (age 81) died at Lisbon [Map]. His son [his son] Edward "The Philosopher" I King Portugal (age 41) succeeded I King Portugal.
Kings Wessex: Great x 10 Grand Son of King Edmund "Ironside" I of England
Kings England: Great x 5 Grand Son of King Henry "Curtmantle" II of England
Kings Scotland: Great x 9 Grand Son of King Duncan I of Scotland
Kings Franks: Great x 16 Grand Son of Louis "Pious" King Aquitaine I King Franks
Kings France: Great x 9 Grand Son of Robert "Pious" II King France
Kings Duke Aquitaine: Great x 14 Grand Son of Ranulf I Duke Aquitaine
Edward "The Philosopher" I King Portugal
Isabella Aviz Queen Consort Castile
Isabella Aviz Queen Consort Portugal
Eleanor Viseu Queen Consort Portugal
Manuel "Fortunate" I King Portugal
Great x 4 Grandfather: Sancho "Populator" I King Portugal 
Great x 3 Grandfather: Alfonso "Fat" II King Portugal
Great x 4 Grandmother: Dulce Barcelona Queen Consort Portugal
Great x 2 Grandfather: Alfonso III King Portugal Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandfather: Alfonso VIII King Castile
Great x 3 Grandmother: Urraca Ivrea Queen Consort Portugal Grand Daughter 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: Denis I King Portugal 2 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandfather: Ferdinand III King Castile III King Leon Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandfather: Alfonso X King Castile X King Leon 2 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Elisabeth Hohenstaufen Queen Consort Castile Queen Consort Leon 
Great x 2 Grandmother: Beatrice Queen Consort Portugal 3 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 3 Grandmother: Mayor Guillén de Guzmán
GrandFather: Alfonso "Brave" IV King Portugal 3 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandfather: Peter II King Aragon
Great x 3 Grandfather: James I King Aragon
Great x 4 Grandmother: Marie Montpellier Queen Consort Aragon
Great x 2 Grandfather: Peter III King Aragon
Great x 4 Grandfather: King Andrew II of Hungary
Great x 3 Grandmother: Violant Árpád Queen Consort Aragon
Great x 1 Grandmother: Elisabeth Barcelona Queen Consort Portugal 6 x Great Grand Daughter of King William "Conqueror" I of England
Great x 4 Grandfather: Frederick I King Jerusalem II Holy Roman Emperor
Great x 3 Grandfather: Manfred King Sicily
Great x 4 Grandmother: Bianca Lancia
Great x 2 Grandmother: Constance Hohenstaufen Queen Consort Aragon 5 x Great Grand Daughter of King William "Conqueror" I of England
Great x 4 Grandfather: Amedeo Savoy IV Count Savoy
Great x 3 Grandmother: Beatrice Savoy Marchioness of Saluzzo 4 x Great Grand Daughter of King William "Conqueror" I of England
Great x 4 Grandmother: Margaret Burgundy Countess Savoy 3 x Great Grand Daughter of King William "Conqueror" I of England
Father: Peter I King Portugal 4 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandfather: Alfonso IX King Leon
Great x 3 Grandfather: Ferdinand III King Castile III King Leon Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Berengaria Ivrea I Queen Castile Grand Daughter of King Henry "Curtmantle" II of England
Great x 2 Grandfather: Alfonso X King Castile X King Leon 2 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandfather: Philip King Germany
Great x 3 Grandmother: Elisabeth Hohenstaufen Queen Consort Castile Queen Consort Leon
Great x 1 Grandfather: Sancho IV King Castile IV King Leon 3 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandfather: Peter II King Aragon
Great x 3 Grandfather: James I King Aragon
Great x 4 Grandmother: Marie Montpellier Queen Consort Aragon
Great x 2 Grandmother: Violante Barcelona Queen Consort Castile Queen Consort Leon
Great x 4 Grandfather: King Andrew II of Hungary
Great x 3 Grandmother: Violant Árpád Queen Consort Aragon
GrandMother: Beatrice Ivrea Queen Consort Portugal 4 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 1 Grandmother: Maria Molina Queen Consort Castile Queen Consort Leon
King John I of Portugal 5 x Great Grand Son of King Henry "Curtmantle" II of England
GrandFather: Pedro Fernández de Castro
Mother: Inês Castro