Background
He was the son of Thomas Jermyn and Catherine Bernard.
He was the son of Thomas Jermyn and Catherine Bernard.
He served as Sheriff of Norfolk and Suffolk in 1530 and 1541. On 10 March 1540 he was knighted by Henry VIII and granted a coat-of-arms. Jermyn lived at Rushbrooke Hall, which he demolished and remodelled in the late 1540s.
Jermyn was the father of Sir Ambrose Jermyn.