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Birth:          25 Jun 1340 Epworth, Isle of Axholme, Lincolnshire, England
Death:          17 Jun 1368 near Constantinople
Cause of Death: killed in battle

Notes
https://en.wikipedia.org/wiki/John_de_Mowbray,_4th_Baron_Mowbray
John de Mowbray, 4th Baron Mowbray (24 June 1340 – 1368) was an English peer. He 
was slain near Constantinople while en route to the Holy Land.
Family[edit]

John de Mowbray, born 25 June 1340 at Epworth, Lincolnshire, was the son of John 
de Mowbray, 3rd Baron Mowbray, of Axholme, Lincolnshire, by his second wife, Joan 
of Lancaster, sixth and youngest daughter of Henry, 3rd Earl of Lancaster.[1][2][3]

Career[edit]

He and twenty-six others were knighted by Edward III in July 1355[3] while English 
forces were at the Downs before sailing to France. In 1356 he served in a campaign in 
Brittany.[2][3] He had livery of his lands on 14 November 1361; however his 
inheritance was subject to the dower which his father had settled on his stepmother, 
Elizabeth de Vere.[3] By 1369 she had married Sir William de Cossington, son and heir 
of Stephen de Cossington of Cossington in Aylesford, Kent; not long after the marriage 
she and her new husband surrendered themselves to the Fleet prison for debt.[2][4] 
According to Archer, the cause may have been Mowbray's prosecution of his 
stepmother for waste of his estates; he had been awarded damages against her of 
almost £1000.[3]

In about 1343 an agreement had been made for a double marriage between, on the 
one hand, Mowbray and Audrey Montagu, the granddaughter of Thomas of Brotherton, 
and on the other hand, Mowbray's sister, Blanche, and Audrey's brother, Edward 
Montagu. Neither marriage took place.[3] Instead, about 1349 a double marriage was 
solemnized between, on the one hand, Mowbray and Elizabeth Segrave, and on the 
other hand, Mowbray's sister Blanche, and Elizabeth Segrave's brother John, Pope 
Clement VI having granted dispensations for the marriages at the request of the Earl of 
Lancaster in order to prevent 'disputes between the parents', who were neighbours.
[5][3] Mowbray had little financial benefit from his marriage during his lifetime as a 
result of the very large jointure which had been awarded to Elizabeth Segrave's 
mother, Margaret, Duchess of Norfolk, who lived until 1399.[6][3] However, when 
Elizabeth Segrave's father, John de Segrave, 4th Baron Segrave, died on 1 April 
1353, Edward III allowed Mowbray to receive a small portion of his wife's eventual 
inheritance. Estate accounts for 1367 indicate that Mowbray enjoyed an annual 
income of almost £800 at that time.[3]

Mowbray was summoned to Parliament from 14 August 1362 to 20 January 1366.[2] On 
10 October 1367 he appointed attorneys in preparation for travel beyond the seas; 
these appointments were confirmed in the following year.[7] He was slain by the Turks 
near Constantinople while en route to the Holy Land.[8] A letter from the priory of 
'Peyn' written in 1396 suggests that he was initially buried at the convent at Pera 
opposite Constantinople;[9][10] according to the letter, 'at the instance of his son 
Thomas' his bones had now been gathered and were being sent to England for burial 
with his ancestors.[7]

His will was proved at Lincoln on 17 May 1369.[11][5] His wife, Elizabeth, 
predeceased him in 1368 by only a few months.[5]

Marriage and issue[edit]

Mowbray married, by papal dispensation dated 25 March 1349,[5] Elizabeth de 
Segrave (born 25 October 1338 at Croxton Abbey),[5] suo jure Lady Segrave, 
daughter and heiress of John de Segrave, 4th Baron Segrave (d.1353),[3] by 
Margaret, daughter and heiress of Thomas of Brotherton, son of Edward I.[12]

They had two sons and three daughters:[12]
John de Mowbray, 1st Earl of Nottingham (1 August 1365 – before 12 February 1383), 
who died unmarried, and was buried at the Whitefriars, London.[12]
Thomas de Mowbray, 1st Duke of Norfolk.[13]
Eleanor Mowbray (born before 25 May 1364),[5] who married John de Welles, 5th 
Baron Welles.[12][14]
Margaret Mowbray (d. before 11 July 1401), who married, by licence dated 1 July 
1369, Sir Reginald Lucy (d. 9 November 1437) of Woodcroft in Luton, Bedfordshire.
[15]
Joan Mowbray, who married firstly Sir Thomas Grey (1359 – 26 November or 3 
December 1400) of Heaton near Norham, Northumberland, son of the chronicler Sir 
Thomas Grey, and secondly Sir Thomas Tunstall of Thurland in Tunstall, Lancashire.
[16][12]

Parents
DE MOWBRAY John (29 Nov 1310 - 4 Oct 1361)
PLANTAGENET Joan "of Lancaster" (ABT 1312 - 7 Jul 1349)

Siblings
DE MOWBRAY John (25 Jun 1340 - 17 Jun 1368)

Marriage To DE SEGRAVE Elizabeth (25 Oct 1338 - BEF 1368)
    m.  

Notes

Parents
DE SEGRAVE John (4 May 1315 - 1 Apr 1353)
PLANTAGENET Margaret (ABT 1320 - 24 Mar 1399)

Children by DE SEGRAVE Elizabeth 25 Oct 1338 - BEF 1368
DE MOWBRAY Joan (ABT 1363 - 1410)
DE MOWBRAY Eleanor (BEF 25 Mar 1364 - BEF 13 Aug 1417)

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