Baron Brain, of Eynsham in the County of Oxford, 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 on 26 January 1962 for the physician and neurologist

Neurologist

A neurologist is a physician who specializes in neurology, and is trained to investigate, or diagnose and treat neurological disorders.Neurology is the medical specialty related to the human nervous system. The nervous system encompasses the brain, spinal cord, and peripheral nerves. A specialist...

 Sir Russell Brain, 1st Baronet

Russell Brain, 1st Baron Brain

Walter Russell Brain, 1st Baron Brain was a British neurologist. He was principal author of the standard work of neurology, Brain's Diseases of the Nervous System, and longtime editor of the eponymous neurological medical journal titled Brain...

. He had already been created a Baronet, of Eynsham in the County of Oxford, in 1954. the titles are held by his eldest son, the second Baron, who succeeded in 1966.

The Hon. Michael Cottrell Brain, second son of the first Baron, is a retired physician and a former Professor of Medicine at McMaster University

McMaster University

McMaster University is a public research university whose main campus is located in Hamilton, Ontario, Canada. The main campus is located on of land in the residential neighbourhood of Westdale, adjacent to Hamilton's Royal Botanical Gardens...

, Canada

Canada

Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...

.

Barons Brain (1962)

• (Walter) Russell Brain, 1st Baron Brain
  Russell Brain, 1st Baron Brain
  Walter Russell Brain, 1st Baron Brain was a British neurologist. He was principal author of the standard work of neurology, Brain's Diseases of the Nervous System, and longtime editor of the eponymous neurological medical journal titled Brain...
  
   (1895–1966)
• Christopher Langdon Brain, 2nd Baron Brain (b. 1926)

The heir presumptive

Heir Presumptive

An heir presumptive or heiress presumptive is the person provisionally scheduled to inherit a throne, peerage, or other hereditary honour, but whose position can be displaced by the birth of an heir or heiress apparent or of a new heir presumptive with a better claim to the position in question...

is the present holder's brother the Hon. Michael Cottrell Brain (b. 1928)

The heir presumptive's heir apparent is his son Thomas Russell Brain (b. 1965)