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Published March 2025. The Deeds of King Henry V, or in Latin Henrici Quinti, Angliæ Regis, Gesta, is a first-hand account of the Agincourt Campaign, and subsequent events to his death in 1422. The author of the first part was a Chaplain in King Henry's retinue who was present from King Henry's departure at Southampton in 1415, at the siege of Harfleur, the battle of Agincourt, and the celebrations on King Henry's return to London. The second part, by another writer, relates the events that took place including the negotiations at Troye, Henry's marriage and his death in 1422.

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Biography of John de Vere 12th Earl of Oxford 1408-1462

Paternal Family Tree: Vere

Before 1399 [his father] Richard de Vere 11th Earl of Oxford (age 13) and Alice Holland Countess of Oxford (age 6) were married. She the daughter of John Holland 1st Duke Exeter (age 46) and Elizabeth Lancaster Duchess Exeter (age 35). He the son of [his grandfather] Aubrey de Vere 10th Earl of Oxford (age 60) and [his grandmother] Alice Fitzwalter Countess of Oxford. He a great x 5 grandson of King Henry "Curtmantle" II of England. She a great granddaughter of King Edward III of England.

Around 1406 [his father] Richard de Vere 11th Earl of Oxford (age 20) and [his mother] Alice Sergeaux Countess Oxford were married. She by marriage Countess of Oxford. He the son of [his grandfather] Aubrey de Vere 10th Earl of Oxford and [his grandmother] Alice Fitzwalter Countess of Oxford. He a great x 5 grandson of King Henry "Curtmantle" II of England.

On 23 Apr 1408 John de Vere 12th Earl of Oxford was born to Richard de Vere 11th Earl of Oxford (age 22) and Alice Sergeaux Countess Oxford at Hedingham Castle [Map].

On 15 Feb 1417 [his father] Richard de Vere 11th Earl of Oxford (age 31) died. His son John (age 8) succeeded 12th Earl of Oxford.

In 1425 John de Vere 12th Earl of Oxford (age 16) and Elizabeth Howard Countess of Oxford (age 15) were married. She by marriage Countess of Oxford. He the son of Richard de Vere 11th Earl of Oxford and Alice Sergeaux Countess Oxford. She a great x 5 granddaughter of King John of England.

In 1436 [his daughter] Elizabeth or Isobel de Vere was born to John de Vere 12th Earl of Oxford (age 27) and [his wife] Elizabeth Howard Countess of Oxford (age 26).

In or before 1441 [his son] Aubrey de Vere was born to John de Vere 12th Earl of Oxford (age 32) and [his wife] Elizabeth Howard Countess of Oxford (age 30).

Chronicle of Gregory. 16 May 1441. Ande the xvj day of May the Duke of Yorke (age 29), the Erle of Oxynforde (age 33), the Erle of Ewe (age 37), the Erle of Ormounde (age 47), and Syr Richard Woodevyle (age 56), whythe many othyr knyghtys and squyers, toke the way towarde Fraunce, and they schippyd at Portysmouthe [Map].

On 08 Sep 1442 [his son] John de Vere 13th Earl of Oxford was born to John de Vere 12th Earl of Oxford (age 34) and [his wife] Elizabeth Howard Countess of Oxford (age 32).

In or after 1443 [his son] George de Vere was born to John de Vere 12th Earl of Oxford (age 34) and [his wife] Elizabeth Howard Countess of Oxford (age 33).

In Apr 1460 [his son] Aubrey de Vere (age 19) and [his daughter-in-law] Anne Stafford Baroness Cobham Sternborough (age 14) were married. She the daughter of Humphrey Stafford 1st Duke of Buckingham (age 57) and Anne Neville Duchess Buckingham (age 52). He the son of John de Vere 12th Earl of Oxford (age 51) and [his wife] Elizabeth Howard Countess of Oxford (age 50). They were third cousin once removed. She a great x 2 granddaughter of King Edward III of England.

Patent Rolls. Nov. 12 [1460]. Exemption of John, earl of Oxford (age 52), for good service in France, Westminster. Normandy and England, and in consideration of his infirmities, from coming in person to the king or any council or parliament, and grant that if he should come of his free will he shall enjoy all privileges as other earls or barons. By ps. etc.

After 29 Mar 1461 [his son-in-law] William Norreys (age 20) and [his daughter] Jane Vere were married. She the daughter of John de Vere 12th Earl of Oxford (age 52) and [his wife] Elizabeth Howard Countess of Oxford (age 51).

Vere Plot to Murder Edward IV

On 12 Feb 1462 John de Vere 12th Earl of Oxford (age 53), his son [his son] Aubrey de Vere (age 21) and Thomas Tuddenham (age 60) were arrested for treason against King Edward IV (age 19). They were subsequently tried by John "Butcher of England" Tiptoft 1st Earl of Worcester (age 34) who was appointed Constable of England five days before.

On 20 Feb 1462 [his son] Aubrey de Vere (age 21) was executed at Tower Hill [Map].

On 26 Feb 1462 John de Vere 12th Earl of Oxford (age 53) was hanged at Tower Hill [Map]. His son [his son] John (age 19) succeeded 13th Earl of Oxford.

Chronicle of England by William of Worcester. In the month of February [1462], John, Earl of Oxford (age 53), his son and heir [his son] Aubrey (age 21), Thomas Tudenham (age 60), knight, John Clopton, John Mongomere, and William Tyrrell, were arrested by John, Earl of Worcester, Constable of England (age 34), on suspicion of receiving letters from Lady Margaret, former Queen of England. They were convicted before the court of the Constable, the said earl was beheaded, Clopton was excused, and all others were drawn and beheaded on a scaffold made for them on Tower Hill in London.

Mense Februarii Johannes comes Oxoniæ, Albredus filius ejus et hæres, Thomas Tudenham, miles, Johannes Clopton, Johannes Mongomere, et Willelmus Tyrrele, per Johannem comitem Wigorniæ, constabularium Angliæ, arrestantur, ob suspicionem litterarum receptarum dominæ Margarets, nuper reginæ Angliæ, coram quo per curiam constabilariæ convicti, dictus comes decollatus est, ac Cloptone excusatus, et omnes alii tracti et decollati sunt in quadam scafalda pro eis facta super montem Turris Londoniæ.

Chronicle of Robert Fabyan. 12 Feb 1462. And upon the xii. day of February was the erle of Oxenforde (age 53), wt the lorde [his son] Aubry (age 21) his elder sone, syr Thomas Todenhame (age 60), Wyllya Tyrell (age 54), & other, brought unto the Towre of London:

Chronicle of Robert Fabyan. 26 Feb 1462. And upon the Fryday next ensuynge, or the. xxvi. daye of ye sayd moneth, the erle of Oxenforde (age 53) was ladde from Westmynster upon his feete, to the sayde place, [of Inesse,]1 & there also behedyd, whose corps was after borne unto ye Frere Augustynes, & there buryed within ye quyer for ye tyme.

Chronicle of Gregory. 26 Feb 1462. And this same year the Erle of Oxforde (age 53), the [his son] Lord Abbry, the lord of Oxforde (deceased) is sone, Syr Thomas Todenham (deceased) knyght, John Mongomery, and William Terelle (deceased) squyer, were takyn in Esex, and brought unto Lundon to the Towre [Map]. Ande thenne they were ledde to Westemyster to the Kings palys, and there they were attaynte of hyghe and mighthy treson that they ymagenyd agayne þe King. And then they were drawe to the Towre from Westemyster. And at the Towre hylle was made a schaffolde for them, and there her heddys were smetyn on, and her bodys beryd, as it plesyd them to be qwethe her bodys.

Calendar of State Papers of Milan 1462. [25 Mar 1462]. Eleven days before the king's departure they discovered a great conspiracy, at the head of which was the Earl of Oxford (deceased), and he, his [his son] eldest son (deceased) and many other knights and esquires lost their heads. Before the king left the treason was discovered in this manner, quidquid fortassis dicatur [Whatever perhaps may be said]. The said earl with his accomplices, sent letters to King Henry and the queen in Scotland, by a servant of his, who, after having been to York, returned to King Edward and presented the letters, which were read as well as copied and then sealed up again and sent by this same messenger to King Henry with a promise that he would return with the reply. He did so and it was done very secretly. After the reply had been read the Earl of Worcester (age 34), who has been made Constable of England1, was sent to take the said earl and others.

el dicto conte con soi complitii mandavano lettere al re Hari et alla regina in Scotia per uno servitore de'soi, el quale, poi fu a Aiorch, ritorno alla Maesta de Re Eduuardo et presentolli le lettere le quale forono lecte et etiam copiate et poi reserrate et subito per el decto messo mandate al re hari con promessa che ritornarebe colla resposta et cosi fece et fu facta molto secretamente et viso responso el Conte de Wygornia, el quale e facto conestabile de Engleterra a fo mandato ad prendere el sopradicto conte et altri.

Note 1. John Tiptoft, Earl of Worcester, appointed Constable of England for life by letters patent dated the 7th February, 1462. Calendar of Patent Rolls, 1461–7, page 74.

On 25 Dec 1475 [his former wife] Elizabeth Howard Countess of Oxford (age 65) died at Stratford.

[his daughter] Mary Vere was born to John de Vere 12th Earl of Oxford and Elizabeth Howard Countess of Oxford.

[his daughter] Jane Vere was born to John de Vere 12th Earl of Oxford and Elizabeth Howard Countess of Oxford.

[his son] Thomas Vere was born to John de Vere 12th Earl of Oxford and Elizabeth Howard Countess of Oxford.

[his son] Richard Vere was born to John de Vere 12th Earl of Oxford and Elizabeth Howard Countess of Oxford.

John de Vere 12th Earl of Oxford 1408-1462 appears on the following Descendants Family Trees:

Royal Ancestors of John de Vere 12th Earl of Oxford 1408-1462

Kings Wessex: Great x 11 Grand Son of King Edmund "Ironside" I of England

Kings Gwynedd: Great x 10 Grand Son of Owain "Great" King Gwynedd

Kings Seisyllwg: Great x 14 Grand Son of Hywel "Dda aka Good" King Seisyllwg King Deheubarth

Kings Powys: Great x 11 Grand Son of Maredudd ap Bleddyn King Powys

Kings England: Great x 6 Grand Son of King Henry "Curtmantle" II of England

Kings Scotland: Great x 10 Grand Son of King Duncan I of Scotland

Kings Franks: Great x 17 Grand Son of Louis "Pious" King Aquitaine I King Franks

Kings France: Great x 11 Grand Son of Robert "Pious" II King France

Kings Duke Aquitaine: Great x 16 Grand Son of Ranulf I Duke Aquitaine

Royal Descendants of John de Vere 12th Earl of Oxford 1408-1462

Brigadier-General Charles FitzClarence

Queen Elizabeth II of the United Kingdom

Queen Consort Camilla Shand

Diana Spencer Princess Wales

Ancestors of John de Vere 12th Earl of Oxford 1408-1462

Great x 4 Grandfather: Hugh de Vere 4th Earl of Oxford

Great x 3 Grandfather: Robert de Vere 5th Earl of Oxford

Great x 4 Grandmother: Hawise Quincy Countess Oxford

Great x 2 Grandfather: Alphonse Vere

Great x 3 Grandmother: Alice Sanford Countess of Oxford

Great x 1 Grandfather: John de Vere 7th Earl of Oxford

Great x 4 Grandfather: Richard Foliot

Great x 3 Grandfather: Jordan Foliot

Great x 4 Grandmother: Margery Stuteville

Great x 2 Grandmother: Jane Foliot

GrandFather: Aubrey de Vere 10th Earl of Oxford 5 x Great Grand Son of King Henry "Curtmantle" II of England

Great x 3 Grandfather: Gunselin Badlesmere

Great x 2 Grandfather: Bartholomew Badlesmere 1st Baron Badlesmere

Great x 3 Grandmother: Joan Fitzbernard

Great x 1 Grandmother: Maud Badlesmere Countess of Oxford 4 x Great Grand Daughter of King Henry "Curtmantle" II of England

Great x 4 Grandfather: Richard de Clare 6th Earl Gloucester 5th Earl Hertford 3 x Great Grand Son of King Henry I "Beauclerc" England

Great x 3 Grandfather: Thomas de Clare 4 x Great Grand Son of King Henry I "Beauclerc" England

Great x 4 Grandmother: Maud Lacy Countess Gloucester and Hertford 4 x Great Grand Daughter of King Henry I "Beauclerc" England

Great x 2 Grandmother: Margaret Clare Baroness Badlesmere 3 x Great Grand Daughter of King Henry "Curtmantle" II of England

Great x 4 Grandfather: Maurice Fitzgerald 4th Lord Offaly

Great x 3 Grandmother: Juliana Fitzgerald 2 x Great Grand Daughter of King Henry "Curtmantle" II of England

Great x 4 Grandmother: Emmeline Longespée Baroness Offaly Great Grand Daughter of King Henry "Curtmantle" II of England

Father: Richard de Vere 11th Earl of Oxford 5 x Great Grand Son of King Henry "Curtmantle" II of England

Great x 4 Grandfather: Walter Fitzrobert

Great x 3 Grandfather: Robert Fitzwalter 1st Baron Fitzwalter Great Grand Son of King Henry "Curtmantle" II of England

Great x 4 Grandmother: Ida II Longespée Grand Daughter of King Henry "Curtmantle" II of England

Great x 2 Grandfather: Robert Fitzwalter 2nd Baron Fitzwalter 2 x Great Grand Son of King Henry "Curtmantle" II of England

Great x 4 Grandfather: Robert Ferrers 6th Earl of Derby 4 x Great Grand Son of King Henry I "Beauclerc" England

Great x 3 Grandmother: Eleanor Ferrers Baroness Fitzwalter 5 x Great Grand Daughter of King Henry I "Beauclerc" England

Great x 4 Grandmother: Eleanor Bohun Countess Derby

Great x 1 Grandfather: John Fitzwalter 3rd Baron Fitzwalter 3 x Great Grand Son of King Henry "Curtmantle" II of England

Great x 3 Grandfather: Thomas de Multon 1st Baron Multon

Great x 2 Grandmother: Joan de Multon Baroness Fitzwalter

GrandMother: Alice Fitzwalter Countess of Oxford 4 x Great Grand Daughter of King Henry "Curtmantle" II of England

Great x 2 Grandfather: Henry Percy 10th and 2nd Baron Percy 5 x Great Grand Son of King John of England

Great x 4 Grandfather: Richard Fitzalan 1st or 8th Earl of Arundel 3 x Great Grand Son of King John of England

Great x 3 Grandmother: Eleanor Fitzalan Baroness Percy 4 x Great Grand Daughter of King John of England

Great x 4 Grandmother: Alice Saluzzo Countess Arundel 6 x Great Grand Daughter of King William "Conqueror" I of England

Great x 1 Grandmother: Eleanor Percy Baroness Fitzwalter 5 x Great Grand Daughter of King Henry "Curtmantle" II of England

Great x 4 Grandfather: Roger Clifford

Great x 3 Grandfather: Robert Clifford 1st Baron Clifford 6 x Great Grand Son of King Henry I "Beauclerc" England

Great x 4 Grandmother: Isabella Vipont 5 x Great Grand Daughter of King Henry I "Beauclerc" England

Great x 2 Grandmother: Idonia Clifford Baroness Percy 4 x Great Grand Daughter of King Henry "Curtmantle" II of England

Great x 4 Grandfather: Thomas de Clare 4 x Great Grand Son of King Henry I "Beauclerc" England

Great x 3 Grandmother: Maud Clare Baroness Clifford Baroness Welles 3 x Great Grand Daughter of King Henry "Curtmantle" II of England

Great x 4 Grandmother: Juliana Fitzgerald 2 x Great Grand Daughter of King Henry "Curtmantle" II of England

John de Vere 12th Earl of Oxford 6 x Great Grand Son of King Henry "Curtmantle" II of England

Mother: Alice Sergeaux Countess Oxford