Nash was probably born in the hamlet of that name near Presteigne on the Herefordshire border with Radnorshire, and in 1376 he paid 5s.9d.relief to take possession of his parents’ lands there. However, at the time of his first mention in the records (in 1366) he was living in Hereford, and in due course the city returned him to five Parliaments. In February 1378 he stood surety with Thomas Oldcastle for Ralph Maylock, proctor of the alien abbot of Lire, when the latter was granted custody at the Exchequer of his abbey’s English lands. A year later he was nominated attorney for the prior of Llanthony and for Leonard Hakluyt, both of whom were going to Ireland in the train of Edmund Mortimer, earl of March. Associated with him in this undertaking was Philip Holgot, another Hereford lawyer with whom he came to be closely linked. In 1379 the two men agreed to act as Sir John Bromwiche’s feoffees of lands in Herefordshire and Northumberland, and at about this time Nash, Holgot, and Bromwiche all shared a royal lease of the confiscated estates of the abbey of Caen. Furthermore, by 1385 Nash and Holgot were employed as trustees by Thomas Oldcastle and his brother, Sir Richard, of property in Radnorshire as well as nearer home. Holgot and Thomas Oldcastle were subsequently to perform similar services on behalf of Nash himself. The common factor which had undoubtedly drawn these men together in friendship was their shared affinity in the retinue of the young earl of March, Roger Mortimer. In Nash’s case this was indicated by his receipt of an annuity of £2 as an apprentice-at-law engaged by the earl by 1387, if not for several years before. Clearly, his identification with members of the Mortimer circle played a significant part in the development of his career, even though in later years he showed himself willing to take fees from other noblemen.
Nash’s increasing importance is demonstrated by his appointment to the Herefordshire bench in 1380, and in 1384 he was for the first time elected to Parliament for the county. His services as a lawyer were much in demand, both by private individuals (for whom he often acted as surety) and by the government, which in May 1389 appointed him one of the royal justices in South Wales. Accordingly, that summer he conducted sessions in Carmarthenshire and Cardiganshire, for a fee of 6d.8d. per day.
Little is known of Nash’s private life, although he may well have been related to Roger Nash, clerk, chamberlain of South Wales in 1387-8, and to William Ash, esquire, of Herefordshire, who occupied the same office from Apart from his bastard son, he had a daughter, Cecily, who after his death married John Cook of Horndon, Essex. Nash’s landed property in Hereford and the nearby villages of Shelwick, Upper and Lower Breinton, Hampton Bishop, Lower Bullingham, Marden and Sutton, was at the time of his death in the hands of feoffees, whose assigned task included the foundation of a chantry in Hereford cathedral, where masses were to be offered for the souls of him and his son. The mayor and citizens of Hereford lent their support to the project in grateful recognition of the services performed on their behalf by the two men.
