Lord Trimleston

Baron Trimlestown, of Trimlestown in County Meath, is a title in the Peerage of Ireland.

The title was created in 1461 for Sir Robert Barnewall, who was the younger brother of Nicholas Barnewall, Chief Justice of the Irish Common Pleas, and younger son of Sir Christopher Bernevall, Lord Chief Justice of the King's Bench in Ireland. He was succeeded by his son Christopher, the second Baron. Christopher was implicated in the Lambert Simnel conspiracy, but received a royal pardon in 1488. His son John, the third Baron, served as Lord Chancellor of Ireland from 1534 until his death in 1538.

The barony became dormant on the death of the sixteenth Baron, in 1879. In 1891 the peerage was claimed by Christopher Patrick Mary Barnewall (de jure 17th Baron Trimlestown), a descendant of Hon. Patrick Barnewall, second son of the seventh Baron. He died before he had fully established his claim, but in 1893 his younger brother Charles Aloysius Barnewall was confirmed in the title by the Committee for Privileges of the House of Lords. As of 2013^[update] the title is held by the grandson of the successful claimant, the twenty-first Baron, who succeeded his elder brother in 1997.

There is no known heir to the barony so on the death of the current holder, it will become dormant until either extinction is proved or an heir found.

The Viscounts Barnewall were members of another branch of the Barnewall family and a third branch were the Barnewall baronets of Crickstown.

There is no known heir to the barony.

...
Wikipedia