Described by Sir Edward Coke as ‘a man famous in his profession’, the MP’s father was indeed the most celebrated lawyer of his day, rising to become chancellor of England—a post held by only one other layman before him. He came originally from Southwick, Northamptonshire, where the Knyvet family had lived for at least two centuries, but by the time of his death, in February 1381, he had greatly extended his estates in that county, as well as buying up other property in Essex, Rutland, Lincolnshire, Huntingdonshire and Cambridgeshire. He was also able to make an extremely good marriage, which, although valuable to him in social rather than financial terms, left his eldest son, the subject of this biography, coheir to the estates of the Bassets of Weldon. Knyvet held office as chancellor for four years, being replaced in January 1377, shortly before the death of Edward III, for whom he acted as an executor. With characteristic efficiency he himself made careful provision of his estates, some of which he settled upon his three younger sons, Robert, Richard and Henry, and his daughter, Margery; while a substantial part of the rest was held as a jointure by his widow, Eleanor. It was thus not until her death, in or shortly before 1388, that John Knyvet gained possession of several manors and other holdings in Northamptonshire and Cambridgeshire which made up the bulk of his inheritance.
Meanwhile, in May 1382, Knyvet bought additional property in Mendlesham, where he had already made his home. He must soon have become connected with the Huntingdonshire MP, John Herlyngton, as in April 1383, a local man offered them joint securities of £20. Herlyngton also had dealings with Knyvet’s brother, Richard, on whose behalf he stood bound in sums totalling £150 a few months later. Other transactions, such as a general release of all legal actions made under heavy financial guarantees to one Albinus Enderby, and the sale of the advowson of a chantry at Cotherstoke in Northamptonshire to the judge, Sir John Holt, occupied Knyvet at this time. All the same, his duties as executor of his father’s will probably took up most of his attention. At some point before 1391, for example, he became involved in a lawsuit for the recovery of a debt of £5 which had been owed to the former chancellor, albeit without any real chance of success.
The dispute over the Basset estates was not the only matter to bring Knyvet into the lawcourts. In 1394, for instance, he arraigned his neighbour John Tyndale, on an assize of mort d’ancestor at Northampton, but although the case dragged on for at least three years, Tyndale never appeared to present his defence. Knyvet himself employed similar tactics in 1402, when he was being sued by the executors of a clerk named John Stacy for the recovery of debts totalling £85, which may, perhaps, be seen as further evidence of the financial problems facing him at this time. Knyvet was then also involved, as plaintiff, in an action for trespass, but this came to an abrupt end in the following year with the award of a pardon to the defendant, a baker from Lincoln.
