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John Mowbray, 2nd Duke of Norfolk (1392 - 19 October 1432), was an English nobleman, who succeeded his father as Duke of Norfolk and became Earl Marshal of England. He married Lady Katherine Neville, daughter of the Earl of Westmorland; their only son would succeed Mowbray as Duke of Norfolk and Earl Marshal.
| Preceded by: The Earl of Westmorland | Earl Marshal 1412–1432 | Followed by: The Duke of Norfolk |