sentences:  Mowbray died before 12 February 1383, aged seventeen and unmarried, and was buried at the Whitefriars in Fleet Street, London.The earldom of Nottingham became extinct at his death.He was succeeded in the barony of Mowbray by his younger brother, Thomas de Mowbray, 1st Duke of Norfolk, who subsequently became Earl of Nottingham on 12 January 1386 by a new creation of the earldom.