MORTIMER, John (d.1446), of Grendon, Northants. and Stoke Goldington, Bucks.

This MP can easily be confused with his namesake and contemporary, Sir John Mortimer of Hatfield in Hertfordshire, especially before 1417, when the latter was knighted. Mortimer was captured by the French in 1406, and subsequently played a prominent part in both the Agincourt campaign and Henry V’s second invasion of Normandy. He suffered a dramatic reversal of fortunes in 1422, however, being charged with treason and executed two years later (E101/69/2/310; E404/21/73, 32/275; N.H. Nicolas, Agincourt, 103n, 382; CPR, 1416-22, pp. 74, 141; DKR, xli. 715, 765, 782; xliv. 547, 563, 566, 587; E. Powell, Kingship, Law and Society, 256-8; Issues ed. Devon, 373, 377, 384).