Sir Walter Langdon-Brown (1870-1946) was a British medical doctor.

He was the son of the Rev. John Brown

John Brown of Bedford

This article is about 19th and early 20th century theologian, for other people with the same name see John Brown .The Rev. John Brown, B.A. D.D. was a British theologian, historian, and pastor. He was born in 1830...

 of Bunyan's Chapel, Bedford

Bedford

Bedford is the county town of Bedfordshire, in the East of England. It is a large town and the administrative centre for the wider Borough of Bedford. According to the former Bedfordshire County Council's estimates, the town had a population of 79,190 in mid 2005, with 19,720 in the adjacent town...

 of and his wife Ada. His mother was a niece of John Langdon Down

John Langdon Down

John Langdon Haydon Down was a British doctor best known for his description of a relatively common genetic disorder that is now called Down syndrome.-Education:...

, describer of Down's syndrome. His sister was Florence Ada Brown, the social reformer, wife of John Neville Keynes

John Neville Keynes

John Neville Keynes was a British economist and father of John Maynard Keynes.-Biography:Born in Salisbury, he was the son of Dr John Keynes and his wife Anna Maynard Neville . He was educated at Amersham Hall School, University College London and Pembroke College, Cambridge, where he became a...

 and mother of John Maynard Keynes

John Maynard Keynes

John Maynard Keynes, Baron Keynes of Tilton, CB FBA , was a British economist whose ideas have profoundly affected the theory and practice of modern macroeconomics, as well as the economic policies of governments...

 (see Keynes family

Keynes family

The Keynes family is a prominent English family that has included notable economists, writers, and actors.The descendants of Geoffrey Keynes , are also related to the Darwin — Wedgwood family.-Family tree of modern Keynes family:-History:...

).

He was educated at Bedford School

Bedford School

Bedford School is not to be confused with Bedford Modern School or Bedford High School or Old Bedford School in Bedford, TexasBedford School is an HMC independent school for boys located in the town of Bedford, England, United Kingdom...

 and St. John's College, Cambridge. He was Regius Professor of Physic

Regius Professor of Physic

Regius Professor of Physic may refer to:*Regius Professor of Physic , a professorship at the University of Cambridge*Regius Professor of Physic , a professorship at the University of Dublin, Trinity College...

 at Cambridge University