Baron Trimlestown

[2] 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.

The tenth baron, Matthias Barnewall, was attainded in 1691 for supporting the Jacobite cause, but his brother successfully recovered the title and family estate.

In 1891 the peerage was claimed by Christopher Patrick Mary Barnewall (de jure 17th Baron Trimlestown), a descendant of Hon.

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 was held by the grandson of the successful claimant of 1893, the twenty-first Baron, who succeeded his elder brother in 1997.