His background and parentage are obscure, but he is generally thought to have been born in
Yorkshire, probably at
Northallerton. He is first heard of in
Ireland in 1585 as secretary to
Sir Richard Bingham,
Lord President of Connaught. For his good services to the
English Crown,
Elizabeth I rewarded him with the
lease of
Boyle Abbey and the office of
Constable of Boyle, in which capacity he commanded a small
garrison. John began the construction of the castle at Boyle, and the settlement of the surrounding district. The King family was associated with the town of
Boyle for centuries. John seems to have divided his time between Boyle and a house in
Dublin near
Baggotrath Castle, on present-day
Baggot Street. Under
King James I, having gained the reputation of being an exceptionally useful and versatile public servant, John held many profitable offices, and by the end of his life, he owned land in twenty-one counties. From 1603, he held the office of
Clerk of the Crown and Hanaper for life: from 1606 he held it jointly with Francis Edgeworth, ancestor of the celebrated Edgeworth family of
Edgeworthstown, whose most famous member was the novelist
Maria Edgeworth. In 1603, he also became
Receiver of revenues, and subsequently Deputy Vice-Treasurer of Ireland. He became Muster-master for Ireland and Clerk of the Cheque in 1609, with a
reversion in favour of his eldest son Robert, and a Commissioner for Compositions in 1611. He sat on commissions for the
Plantation of
County Wexford and
County Longford. He became a Commissioner of the Irish
Court of Wards in 1611. He sat on the Council of
Munster, and at different times was authorised to act as temporary
governor of
Connacht,
Leinster and
Ulster. He was
knighted and sworn in as a member of the Privy Council in 1609. In the
Parliament of Ireland of 1613-15, he was one of the two MPs for
County Roscommon. ==Marriage and children==