It is likely that this MP came from a family which derived its name from Alderley in Gloucestershire. An earlier John Alderley had come to Wiltshire when he married Thomasina, the daughter of Oliver Harnham, and received with her in the 1390s a settlement of a remainder interest in lands in the south of the county at West Harnham, East Harnham and Britford, as entailed on them and their issue, to which was later added the manor of Collingbourne Sunton.
Quite how close John Alderley’s relationship was with Nicholas is not revealed in the surviving records, although it is known that he too came from Gloucestershire and like Nicholas he was associated with Horton, for he appeared at the Exchequer in April 1437 as mainpernor for the lessee of the manor there which Sir Walter de la Pole* had previously held ‘by the courtesy’.
The day Alderley was retained by Haddon fell during the prorogation of the Parliament in which he was currently representing Great Bedwyn in the Commons. There is nothing to indicate that he was known personally to the burgesses or held property in the neighbourhood of Bedwyn. Nor was he resident there, for he lived some distance away at West Kington, in the same part of north-west Wiltshire as his putative kinsman Nicholas. Described as such, and as a ‘gentleman’, he stood surety in the Exchequer for the alnager of Gloucestershire in May 1457, and for the dean of the collegiate church of Stafford, Henry Filongley* and William Cumberford* in February 1459.
Little more is recorded about Alderley, apart from his further appearances as a mainpernor for lessees of Crown lands in Gloucestershire and Wiltshire. On one occasion he was called ‘of London’, but he still lived at West Kington,
