John de Mowbray, 2nd Duke of Norfolk

John de Mowbray, 2nd Duke of Norfolk, 3rd Earl of Nottingham, 8th Baron Mowbray, 9th Baron Segrave KG, Earl Marshal was an English nobleman and soldier. He was a younger son of the first Duke of Norfolk and Lady Elizabeth Fitzalan, but inherited his father's earldom of Norfolk when his elder brother rebelled against King Henry IV and was executed before reaching the age of inheritance. This and the fact that his mother lived to old age and held a third of his estates in dower, meant that until the last few years of his life he was, although an important political figure, poorly-off financially.