John Barnewall, 3rd Baron Trimleston, was an Irish nobleman, judge and politician. He was the eldest son of Christopher Barnewall, 2nd Baron Trimlestown and his wife Elizabeth Plunket, daughter of Sir Thomas Fitz-Christopher Plunket of Rathmore, Lord Chief Justice of the King's Bench in Ireland and his second wife Marian Cruise. He succeeded his father as 3rd Baron about 1513. His father, like most of the Anglo-Irish aristocracy, had supported the claim of the pretenderLambert Simnel to the English throne in 1487. After the failure of Simnel's rebellion, he received a royal pardon. His ancestors came to Ireland originally with Henry II and received large grants of land in County Cork. However, at the first favourable opportunity the old proprietors, the O'Sullivans, rose and murdered the whole family save one young man, who was absent studying law in England. He ultimately returned to Ireland and settled at Drimnagh, near Dublin.
Biography
The subject of our sketch rose to high office in Ireland under Henry VIII; he was knighted around 1513, and received grants of land near Dunleer. He also owned Roebuck Castle, in south County Dublin, which came into the Barnewalll family through his grandfather's marriage to Elizabeth le Brun, daughter and heiress of Christopher le Brun. He was unusual among the Irish nobility in his time both in his legal ability and his willingness to hold judicial office. O'Flanagan suggests that in becoming a judge he wished to follow the distinguished example of his maternal grandfather, Chief Justice Plunket. He was made Attorney General for Ireland in 1504, Solicitor General for Ireland and King's Sergeant shortly after, a justice of the Court of King's Bench in 1514, Deputy Treasurer and then Lord Treasurer of Ireland in 1524 and Lord Chancellor of Ireland in 1534. O'Flanagan praises him as an expert on finance as well as law, but adds somewhat cynically that his greatest talent was for looking after his own interests, as evidenced by the substantial grants of lands at Dunleer made to him by the English Crown. In 1536, under the command of the Lord Treasurer, Sir William Brabazon, he made an incursion into Offaly, and drove back the O'Conor clan, who were then ravaging the Anglo-Irish settlements. The next year, commissioned by the Privy Council of Ireland, he negotiated successfully with the O'Neills. During the Rebellion of Silken Thomas, he was one of the Irish nobles whose loyalty to the Crown was considered to dubious, but it seems that these suspicions were not strong enough for any action to be taken against him. After the failure of the Rebellion he received a royal pardon, like most of his fellow nobles who had been suspected, but not proven, to have supported it. He died on 25 July 1538.
Family
He was four times married. Only the names of his first and second wives are known for certain: they were Janet Bellew of Bellewstown, and Margaret, daughter of Patrick FitzLeones, who was three times Lord Mayor of Dublin between 1477 and 1495; her mother was a member of the influential FitzEustace family. He had at least three children-
Elizabeth Barnewall, who married three times: her husbands were George Plunkett, Christopher Eustace and William Darcy.
Catherine Barnewall, who married Patrick Hussey, Baron Galtrim, and had four children, including James, Baron Galtrim, and Mary, who married Oliver Plunkett.
Patrick Barnewall, Solicitor General for Ireland and Master of the Rolls in Ireland, was his nephew, the son of his sister Alison who married their cousin Roger Barnewall of Kingsland.
