It may be confidently assumed that the MP belonged to the family seated at Bonham in Somerset, which had at its head in the second half of the fourteenth century Nicholas Bonham† (d.1386), a Member in eight Parliaments for the adjacent county of Wiltshire. Nicholas left three sons: John (d.1411), another Nicholas and Thomas† (d.1420), of whom the last distinguished himself as three-times sheriff of Wiltshire and the shire’s representative in three Parliaments in the first two decades of the fifteenth century, and served as both regional steward of the duchy of Lancaster and steward of the estates of the bishop of Salisbury. The eldest son, John, inherited the manor of Bonham and lands in Berwick St. James, although he gave up all title to the manor of Great Wishford in Wiltshire to his father’s widow Edith, and this particular property later passed to his brother Thomas, who kept it as his seat. Because John left no legitimate male issue his substantial share of the family estates was also to fall in due course to Thomas’s branch of the family.
The identity of this MP is something of a mystery. It might be thought that he was John, the illegitimate son of the John Bonham who died in 1411, born to a woman called Margaret Rous.
Even so, the other references to someone of this name do not go far towards building a rounded picture of the MP’s life. He was perhaps the man who mustered in the retinue of Henry Bourgchier, count of Eu, at Portsdown in 1441 prior to their embarkation in the expedition led by Bourgchier’s brother-in-law the duke of York,
