The Clutton-Brock family were landed gentry, of Pensax Court, near Tenbury, Worcestershire, where they had lived since the 1600s.
[2] The family name originated in the adoption of the additional surname of 'Brock' by John Alan's father, Thomas Clutton, J.P., D.L., in 1809, as per a stipulation in the will of his maternal great-uncle, Thomas Brock, of Chester, Cheshire, in which county the Clutton family had been resident since the reign of Henry III.
Following a short period in a stockbroker's office, he was called to the bar in 1895 by the Inner Temple, working as a barrister for some years.
In 1908 Clutton-Brock was appointed art critic on The Times, having previously occupied the same role on the staff of the Tribune and The Morning Post; he wrote however on a plethora of subjects, from gardening to religion.
In 1903, he married Evelyn Alice, the daughter of the civil engineer Leveson Francis Vernon-Harcourt[4] He lived at The Red House, Godalming, Surrey.