Ambrose Jermyn

Sir Ambrose Jermyn (1511 – 5 April 1577) was an English courtier, magistrate and landowner.

Jermyn was the son of Sir Thomas Jermyn of Rushbrooke, Suffolk and Anne Spring, the eldest daughter of Thomas Spring of Lavenham. He inherited his father's Rushbrooke Hall estate following his death in 1552. A fervent Roman Catholic, he was knighted by Mary I and served as a Justice of the Peace in Suffolk. In this role he was a notable prosecutor and persecutor of Protestants across East Anglia until the accession of Elizabeth I. He served as Sheriff of Norfolk and Suffolk in 1558 and 1572.

In 1538 he married Anne Heveningham, daughter of George Heveningham of Rushbrooke, and together they had thirteen children. He was succeeded by eldest surviving son, Sir Robert Jermyn, a Protestant magistrate.