John de Mowbray, 4th Baron Mowbray (24 June 1340–1368) was the son of John de Mowbray, 3rd Baron Mowbray

John de Mowbray, 3rd Baron Mowbray

John de Mowbray, 3rd Baron Mowbray was the son of John de Mowbray, 2nd Baron Mowbray. He was born on 29 Nov 1310 at Hovingham, Yorks...

 and Joan of Lancaster

Joan of Lancaster

Joan of Lancaster sometimes called Joan Plantagenet after her dynasty's name, was the third daughter of Henry, 3rd Earl of Lancaster and Maud Chaworth.-Marriage:...

, daughter of Henry, 3rd Earl of Lancaster

Henry, 3rd Earl of Lancaster

Henry , 3rd Earl of Leicester and Lancaster was an English nobleman, one of the principals behind the deposition of Edward II of England.-Family and lineage:...

.

He was born on 25 June 1340 at Epworth.
As was the custom of lords at the time, de Mowbray served in the French wars. The 4th Baron took the cross and died in Thrace near Constantinople

Constantinople

Constantinople was the capital of the Roman, Eastern Roman, Byzantine, Latin, and Ottoman Empires. Throughout most of the Middle Ages, Constantinople was Europe's largest and wealthiest city.-Names:...

, fighting the Turks in 1368.

John de Mowbray married Elizabeth de Segrave, 5th Baroness Segrave, daughter of Sir John de Segrave, 4th Baron Segrave, and Margaret, Duchess of Norfolk on 25 March 1349.

Children

John and Elizabeth had at least two sons, and several daughters:

• John de Mowbray
  John Mowbray, 1st Earl of Nottingham
  John de Mowbray, 1st Earl of Nottingham was the son of John de Mowbray, 4th Baron Mowbray.Mowbray was created Earl of Nottingham by Richard II...
  
  ; succeeded his father to the barony and created Earl of Nottingham
  Earl of Nottingham
  Earl of Nottingham is a title that has been created seven times in the Peerage of England.-Earls of Nottingham, First creation :* John de Mowbray , 5th Baron Mowbray-Earls of Nottingham, Second creation :...
  
   by Richard II
  Richard II of England
  Richard II was King of England, a member of the House of Plantagenet and the last of its main-line kings. He ruled from 1377 until he was deposed in 1399. Richard was a son of Edward, the Black Prince, and was born during the reign of his grandfather, Edward III...
  
  .
• Thomas de Mowbray
  Thomas de Mowbray, 1st Duke of Norfolk
  Thomas de Mowbray, 1st Duke of Norfolk, KG, Lord Marshal and Earl Marshal was an English nobleman.-Life:...
  
  ; succeded his brother and created 1st Duke of Norfolk.
• Eleanor de Mowbray; married Roger la Warr, 3rd Baron De La Warr.
• Margaret 'Eleanor' de Mowbray; married John de Welles
  John de Welles, 5th Baron Welles
  John de Welles, 5th Baron Welles was an English soldier and noble. He married Margaret de Mowbray , daughter of John, Lord Mowbray by Elizabeth, Baroness Segrave....
  
  , 5th Baron Welles
  Baron Welles
  The title of Baron Welles has been created thrice. It was first created for Adam de Welles on May 6, 1299 in the Peerage of England by writ of summons. This creation was extinguished by attainder in 1469. It was created a second time in the Peerage of England by writ of summons for Sir Richard...
  
  .
• Anne de Mowbray; became Abbess of Barking.
• Joan de Mowbray; married Sir Thomas Grey
  John Grey, 1st Earl of Tankerville
  John Grey, 1st Earl of Tankerville, 6th Lord of Powys jure uxoris, KG was an English peer and eminent soldier in the Hundred Years' War between England and France under Henry V of England.-Family:...
  
  .
• Margaret de Mowbray; married Sir Reginald Lucy of Dallington, and had issue.