Individual Details

Mary was the daughter of Humphrey de Bohun, 7th Earl of Hereford, and Joan Fitzalan (1347/48–1419), the daughter of Richard FitzAlan, 10th Earl of Arundel, and Eleanor of Lancaster. Through her mother, Mary was descended from Llywelyn the Great.
Mary and her elder sister, Eleanor de Bohun, were the heiresses of their father's substantial possessions. Eleanor became the wife of Thomas of Woodstock, 1st Duke of Gloucester, the youngest child of Edward III. In an effort to keep the inheritance for himself and his wife, Thomas of Woodstock pressured the child Mary into becoming a nun. However, Woodstock's older brother John of Gaunt (Mary's future father-in-law) abducted her from the convent to be married to his son—the future Henry IV. This event did not help the relationship between the two brothers.
John of Gaunt had planned for the marriage between Mary and Henry to remain unconsummated until Mary was sixteen, but the couple disobeyed. Consequently, Mary became pregnant at fourteen; the firstborn, a son, lived only a few days. He was Edward, b. April 1832.

When Mary married Henry Lancaster, he was known as Bolingbroke and not in direct line of succession to the throne. She died before he became King Henry IV, so was never Queen, although her son would become Henry V. Mary died at Peterborough Castle, giving birth to her last child, daughter Philippa who married in 1406, Eric of Pomerania, King of Denmark, Norway, and Sweden.

Birth	1368
Marriage	27 Jul 1380	Arundel Castle - Henry Lancaster IV, King of England, (1399-1413)
Death	4 Jun 1394

Spouse	Henry Lancaster IV, King of England, (1399-1413) (1367 - 1413)
Child	Henry Lancaster V, King of England (1413-1422) (1386 - 1422)