p 419 -
... Sir Morgan John of Tredegar was succeeded on his death in 1499 or 1500 by his son John ap Morgan, also known as John Morgan. Sir Morgan John was a brother-in-law of William Morgan of Pencoed, having married the latter's sister, Margaret, and John Morgan was William Morgan's nephew. John Morgan was a minor at the time of his father's death but was apparently of age by 1509 when, as lieutenant of Henry, Lord Stafford, the brother of Edward, duke of Buckingham, he was acting as sheriff of the lordship of Newport (Wentloog) and steward of the lordship of Machen. (98) ...
p 421 -
... Next to the Morgans of Pencoed and the Morgans of Tredegar, the most prominent branch of the Morgan family in Gwent in the early sixteenth century was the Morgan family of Machen. This branch of the family was founded by Thomas Morgan, a younger brother of Sir Morgan John (d. 1499 or 1500) of Tredegar. ...