Although of unknown parentage, Wermyston was probably a kinsman of Thomas Wermyston, who served six terms as a jurat of Romney between 1430 and 1440.
Wermyston’s earliest known employment on behalf of Romney was in 1430, when he rode to plead with the royal purveyor about demands that the town faced in relation to the King’s coronation voyage to France.
Wermyston was probably dead by March 1453 when Isabel Wermyston, possibly his daughter, appears to have begun paying maltolts in his place. She continued to pay them until 1464.
