Thomas Ryves was born around 1583, eighth son of John Ryves (1532-1587) of Damory Court, near
Blandford, Dorset, and his wife Elizabeth Marvyn (died 1609), daughter of Sir
John Marvyn of
Fonthill Gifford and his first wife Jane Baskerville. He belonged to a highly regarded family: one of his brothers,
Sir William Ryves, became
Attorney General for Ireland and a judge of the
Court of King's Bench (Ireland); another brother,
George Ryves, became Warden of
New College, Oxford. Dr.
Bruno Ryves, royal chaplain and
Dean of Windsor was a first cousin; and
Sir John Davies, William Ryves' predecessor as Irish Attorney General, was his relative by marriage (he married a descendant of Sir John Marvyn). Sir
Robert Napier,
Chief Baron of the Exchequer, was the father-in-law of Thomas' eldest brother, Sir John Ryves. Yet another brother James settled in County Kerry. His father, who was about 50 when Thomas was born, died when he was very young. Ryves entered
Winchester College in 1590 and became a fellow of
New College, Oxford in 1598. He took his degree of Bachelor of Common Law in 1605 and his doctorate in 1610; he is also said to have studied for a time in
France. In 1612 he became an
advocate of
Doctors' Commons. == Irish career ==