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Birth:          30 Nov 1384 Alnwick Castle, Northumberland, England
Death:          3 Aug 1415 North Gate, Southampton, Hampshire, England
Cause of Death: beheaded

Notes
https://en.wikipedia.org/wiki/Thomas_Grey_(1384%E2%80%931415)
Sir Thomas Grey (30 November 1384 – 2 August 1415), of Castle Heaton near 
Norham,[1] Northumberland, was one of the three conspirators in the Southampton 
Plot against King Henry V in 1415.
Family[edit]

Sir Thomas Grey, born 30 November 1384 in 'le Midyllgathouse’ at Alnwick Castle,[2] 
seat of the Percys, Earls of Northumberland, came from a family long prominent among 
the nobility in the border region of Northumberland.[3]

He was the eldest son and heir of Sir Thomas Grey (1359 - 26 November 1400) of 
Heton near Norham, Northumberland, by his wife, Joan Mowbray (d.1410), sister of 
Thomas de Mowbray, 1st Duke of Norfolk,[4] and daughter of John de Mowbray, 4th 
Baron Mowbray (d. 17 June 1368), and Elizabeth de Segrave, daughter and heiress of 
John de Segrave, 4th Baron Segrave. Through his mother, a granddaughter of 
Margaret, Duchess of Norfolk (d.1399), Sir Thomas Grey was a descendant of King 
Edward I. His paternal grandparents were the soldier and chronicler Sir Thomas Grey 
of Heton, and Margaret, daughter and heiress of William de Pressene of Presson.[5]

He had three brothers and a sister:[6]
John Grey, 1st Earl of Tankerville (d.1421), who married Joan de Cherleton, stepsister 
of Edmund Mortimer, 5th Earl of March.[7]
Sir Henry Grey of Ketteringham, Norfolk, who married Emme Appleyard.[8]
William Grey, Dean of York and Bishop of London (1426) (d.1436).[9]
Matilda Grey (1382–1451), who married Sir Robert Ogle (d. 12 August 1436) of Ogle, 
Northumberland, by whom she had issue.[10]

A Soldier's Life[edit]

Grey's father, Sir Thomas Grey (1359-1400), and Sir Thomas Erpingham, were among 
those chosen allies of Henry Bolingbroke to witness the abdication of King Richard II 
in Westminster Hall on 29 September 1399.[11]

Grey was only 16 years of age when he succeeded his father in 1400, and was shown 
great favour in the early years of the reign of Henry IV, including the grant of the 
wardship of his own inheritance while he was under age.[11] By August 1404 he had 
been retained for life by Ralph Neville, 1st Earl of Westmorland, but by May 1408 was 
in the service of Henry, Prince of Wales.[11]

Grey's part in the Southampton Plot was attributed by Grey himself to 'poverty and 
covetousness'.[12] In 1412 Grey married his 12-year-old son and heir, Thomas Grey, to 
Isabel, the 3-year-old daughter of Richard of Conisburgh, 3rd Earl of Cambridge. As 
part of the marriage settlement, Grey acquired the lordship of Wark-in-Tyndale at a 
'bargain price', which was nonetheless more than he could afford, leading Pugh to 
conclude that Grey was Cambridge's 'dupe', 'whose intrigues brought them both to 
disaster'.[13]

Grey, Cambridge, and Henry Scrope, 3rd Baron Scrope of Masham, were the 
ringleaders of the failed Southampton Plot of 1415, which was a plot to assassinate 
King Henry V at Southampton before he sailed to France and to replace him with 
Edmund Mortimer, 5th Earl of March.[14] On 31 July 1415 Mortimer revealed the plot 
to the King at Portchester Castle, near Portsmouth.[15] The conspirators were 
promptly arrested and executed. Sir Thomas Grey was beheaded at the North Gate of 
Southampton on 2 August 1415.[16]

The Southampton Plot is dramatized in Shakespeare's Henry V, and in the anonymous 
play, The History of Sir John Oldcastle.

Family[edit]

Sir Thomas Grey married, before 20 February 1408, Lady Alice Neville, the daughter of 
Ralph Neville, 1st Earl of Westmorland, by his first wife Margaret (d.1396), daughter of 
Hugh de Stafford, 2nd Earl of Stafford, by whom he had four sons and four or five 
daughters:[17]
Sir Thomas Grey (1404 – d. before 1426), who in 1412, at eight years of age, was 
betrothed to Isabel, then three years of age, only daughter of Richard of Conisburgh, 
3rd Earl of Cambridge,[18] and Anne Mortimer, they had one son.[19]
Sir Ralph Grey (d. 17 March 1442), who married Elizabeth, daughter of Henry 
FitzHugh, 3rd Baron FitzHugh, and Elizabeth Grey, and left issue.[20]
Sir John Grey.[21]
William Grey (d.1478), Chancellor of Oxford University, Bishop of Ely, and Lord High 
Treasurer.[22]
Eleanor who married Sir John Arundel.[21][23]
Joan Grey, who married Sir John Salvin.[21]
Elizabeth Grey, who married firstly, Sir William Whitchester, and secondly, Sir Roger 
Widdrington.[21]
Margaret Grey, who married Gerard Widdrington.[citation needed]

Grey's widow, Alice, married Sir Gilbert Lancaster, by whom she had one son, Sir 
Gilbert Lancaster. Alice was still living on 22 August 1453.[21

Parents
DE GREY Thomas (1359 - 26 Nov 1400)
DE MOWBRAY Joan (ABT 1363 - 1410)

Siblings
DE GREY Thomas (30 Nov 1384 - 3 Aug 1415)
GREY Maud (ABT 1394 - AFT 21 Aug 1451)

Marriage To NEVILLE Alice (ABT 1384 - )
    m.  

Notes

Parents
NEVILLE Ralph (ABT 1364 - 21 Oct 1425)
DE STAFFORD Margaret (ABT 1365 - 9 Jun 1396)

Children by NEVILLE Alice ABT 1384 - 
DE GREY Ralph (9 Sep 1406 - 17 Mar 1443)

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