Baron Trevethin, of Blaengawney in the County of Monmouth, is a title in the Peerage of the United Kingdom

Peerage of the United Kingdom

The Peerage of the United Kingdom comprises most peerages created in the United Kingdom of Great Britain and Ireland after the Act of Union in 1801, when it replaced the Peerage of Great Britain...

. It was created in 1921 for the prominent judge Sir Alfred Lawrence

Alfred Lawrence, 1st Baron Trevethin

Alfred Tristram Lawrence, 1st Baron Trevethin PC was a British lawyer and judge. He served as Lord Chief Justice of England from 1921 to 1922....

, Lord Chief Justice of England from 1921 to 1922. His third son the Hon. Geoffrey Lawrence

Geoffrey Lawrence, 1st Baron Oaksey

Geoffrey Lawrence, 3rd Baron Trevethin, 1st Baron Oaksey, DSO, TD, KC, PC was the main British Judge during the Nuremberg trials after World War II, and President of the Judicial group.-Early life:...

 was also a noted jurist and served as the main British judge at the Nuremberg trials

Nuremberg Trials

The Nuremberg Trials were a series of military tribunals, held by the victorious Allied forces of World War II, most notable for the prosecution of prominent members of the political, military, and economic leadership of the defeated Nazi Germany....

. In 1947 he was himself raised to the peerage as Baron Oaksey, of Oaksey in the County of Wilts. In 1959 he succeeded his elder brother as third Baron Trevethin, although he continued to be known as Lord Oaksey. the titles are held by his only son, the fourth Baron Trevethin and second Baron Oaksey, who succeeded in 1971. He is a well-known horse racing journalist. Like his father he is known simply as Lord Oaksey.

Barons Trevethin (1921)

• Alfred Tristram Lawrence, 1st Baron Trevethin (1843–1936)
• Charles Trevor Lawrence, 2nd Baron Trevethin (1879–1959)
• Geoffrey Lawrence, 3rd Baron Trevethin and 1st Baron Oaksey
  Geoffrey Lawrence, 1st Baron Oaksey
  Geoffrey Lawrence, 3rd Baron Trevethin, 1st Baron Oaksey, DSO, TD, KC, PC was the main British Judge during the Nuremberg trials after World War II, and President of the Judicial group.-Early life:...
  
   (1880–1971)
• John Geoffrey Tristram Lawrence, 4th Baron Trevethin and 2nd Baron Oaksey
  John Lawrence, 2nd Baron Oaksey
  John Geoffrey Tristram Lawrence, 4th Baron Trevethin, 2nd Baron Oaksey is a British aristocrat, horse racing journalist and television commentator/presenter, and former amateur jockey. He is the son of the noted jurist Geoffrey Lawrence, 1st Baron Oaksey. He prefers to be called Oaksey although...
  
   (b. 1929)

The heir apparent

Heir apparent

An heir apparent or heiress apparent is a person who is first in line of succession and cannot be displaced from inheriting, except by a change in the rules of succession....

 is the present holder's only son the Hon. Patrick John Tristram Lawrence (b. 1960)

Barons Oaksey (1947)

• Geoffrey Lawrence, 1st Baron Oaksey
  Geoffrey Lawrence, 1st Baron Oaksey
  Geoffrey Lawrence, 3rd Baron Trevethin, 1st Baron Oaksey, DSO, TD, KC, PC was the main British Judge during the Nuremberg trials after World War II, and President of the Judicial group.-Early life:...
  
  (1880–1971) (succeeded as Baron Trevethin in 1959)

see above for further holders