John was almost certainly a relation, perhaps a brother, of his contemporary, Philip Leweston*, the lawyer who represented Dorset boroughs in 1431, 1432 and 1435 (on the last occasion sitting for Dorchester when John represented Lyme Regis). Leland thought that the family had been settled at Lewston in Long Burton (in the north of the county), since the Norman Conquest, and elsewhere it is noted that a John Leweston paid homage for lands in the nearby manor of Sherborne in 1377. Hutchins begins his account of the family in the reign of Henry VII, although it is clear from the careers of John and Philip that it had produced men of note earlier in the century.
In 1428 John Leweston, our MP, was recorded holding half a knight’s fee in Lewston, which had belonged to one of his ancestors in the early fourteenth century.
The MP may have been the John Leweston associated with Philip in a plaint of intrusion brought by (Sir) William Estfield* regarding property in the London parish of All Hallows at the Hay in 1439, and, called ‘son of Roger Leweston’, in the acquisition of a lease of land in Wimbledon, Surrey, four years later.
