Mary de Bohun

Mary de Bohun (c. 1369/70 – 4 June 1394) was the first wife of Henry Bolingbroke, Earl of Northampton, who became King Henry IV. As she died before her husband came to the throne, Mary was never queen. She and Henry had six children together, including the future Henry V.

Source: Wikipedia — https://en.wikipedia.org/wiki/Mary_de_Bohun