Maurice FitzThomas FitzGerald, 4th Earl of Kildare was a prominent Irish nobleman in the Peerage of Ireland who held the office of Lord Justice of Ireland.
Sir Gerald Aylmer was an Irish judge in the time of Henry VIII, who played a key part in enforcing the Dissolution of the Monasteries. His numerous descendants included the Barons Aylmer.
James Fleming was an Irish nobleman, who sat as a member of the House of Lords in the Irish Parliament in 1491 and also served as High Sheriff of Meath.
Christopher Fleming was an Irish nobleman, who was Lord High Treasurer of Ireland from 1514 until his death. He succeeded as 8th Baron Slane in 1492.
Thomas Fleming was an Irish peer, and a member of the Parliament of Ireland of 1585. He was the son of James Fleming, and great-grandson of James Fleming, 7th Baron Slane. His mother was Ismay Dillon, daughter of Sir Bartholomew Dillon, Lord Chief Justice of Ireland and his first wife Elizabeth Barnewall; after his father's death she remarried Sir Thomas Barnewall of Trimlestown.
Sir James Butler of Polestown was a warlord in Yorkist Ireland.
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 pretender Lambert Simnel to the English throne in 1487. After the failure of Simnel's rebellion, he received a royal pardon.
Sir Robert Dillon of Riverston was an Irish lawyer, judge, and politician. He came from a family with a distinguished record of judicial service. He pursued a successful career as a judge, which was, however, dogged by accusations of corruption and other serious wrongdoing, of which the worst was that he had falsely condemned Nicholas Nugent, another judge and rival, to death. Sir Robert Dillon, the subject of this article, must not be confused with an earlier Sir Robert Dillon of Newtown, his grand-uncle, who was also Chief Justice of the Irish Common Pleas.
Sir William Welles was an English-born statesman and judge in fifteenth-century Ireland, who held the office of Lord Chancellor of Ireland. He was the younger brother of Lionel de Welles, 6th Baron Welles. Lionel was a prominent supporter of the House of Lancaster, who was killed at the Battle of Towton on 29 March 1461.
Sir Patrick Barnewall or Barnwall, was the eldest son of Sir Christopher Barnewall of Turvey House, Grace Dieu Abbey, and Fieldston. Christopher in turn was the son of the elder Sir Patrick Barnewall, who in 1534 was made Serjeant-at-law (Ireland) and Solicitor-General for Ireland, and in 1550 became Master of the Rolls in Ireland. Patrick's mother was Marion Sherle, daughter of Richard Sherle of Shallon, County Meath: after his father's death, she remarried the prominent judge Sir Lucas Dillon. She died in 1607.
The Rochfort family came to Ireland in the thirteenth century and acquired substantial lands in counties Kildare, Meath and Westmeath. Several members of the family were prominent lawyers and politicians. They gained the title Earl of Belvedere, and gave their name to the village of Rochfortbridge. The main Rochfort line ended with the death of the 2nd Earl of Belvedere in 1814.
Sir Lucas Dillon, also called Luke, was a leading Irish barrister and judge of the Elizabethan era who held the offices of Attorney General for Ireland and Chief Baron of the Irish Exchequer. He supported the Lord Deputy Henry Sidney in the cess controversy and the Lord Deputy John Perrot in the Desmond Rebellions. He was held in high regard by Queen Elizabeth, but was accused by his enemies of corruption and maladministration.
James Bathe (c.1500–1570) was an Irish judge of the Tudor era, who was notable for serving as Chief Baron of the Irish Exchequer for thirty years under four successive monarchs. He was the grandfather of the 1st Earl of Roscommon, and of the noted musicologist William Bathe.
Robert Cusack (c.1516–1570) was an Irish judge of the sixteenth century, who held office as a Baron of the Court of Exchequer (Ireland). He was strongly recommended for the position of Chief Baron of the Irish Exchequer, but was passed over for the office, though with a promise of future preferment. His career was cut short by his premature death.
Sir Thomas Fitz-Christopher Plunket (c.1407-1471) was a leading Irish lawyer and judge of the fifteenth century who held office as Lord Chief Justice of Ireland. He was an ancestor of the Duke of Wellington in the female line. His second marriage to the heiress Marian Cruise inspired the ballad The Song of Mary Cruys.
Sir Thomas Plunket (c.1440–1519) was a wealthy Irish landowner, lawyer and judge in fifteenth-century and early sixteenth-century Ireland. He held office as Chief Baron of the Irish Exchequer and Chief Justice of the Irish Common Pleas. After the change of the English royal dynasty in 1485, his loyalty to the new Tudor dynasty was deeply suspect, and he was involved in two attempts to put a pretender on the English throne. On each occasion he was disgraced, fined and removed from office; yet he had sufficient political influence to ensure his return to favour and high office.
James Dillon, 1st Earl of Roscommon fought for the crown in the Nine Years' War. He was ennobled despite being a Catholic after his son Robert turned Protestant.
Robert Dillon, 2nd Earl of RoscommonPC (Ire) was styled Baron Dillon of Kilkenny-West from 1622 to 1641 and succeeded his father only a year before his own death. He supported Strafford, Lord Deputy of Ireland, who appointed him keeper of the great seal. Dillon was in December 1640 for a short while a lord justice of Ireland together with Sir William Parsons.
Sir Robert Dillon of Newtown near Trim was an Irish judge of the Tudor era. He served as Chief Justice of the Irish Common Pleas for more than twenty years, despite repeated calls for his removal on the grounds of age and ill health.
Luke Plunket, 3rd Earl of Fingall (1639–1684) was an Irish soldier and politician. He was one of the signatories of the Catholic Remonstrance of 1661.