Sir John de Montagu, KG, Earl Marshal of England, born 1350, knighted 1369, succeeded uncle as Earl of Salisbury 1397, beheaded 5 Jan 1399/1400; married before 4 May 1383 Maud, died 1424 before 5 Aug, daughter of Adam Francis, died 1375, MP, mercer, alderman 1352-1375, Lord Mayor of London 1352-4; will dated 28 Aug 1374, enrolled 14 May 1375. [Magna Charta Sureties]