The Colvin family, for the purposes of this article, is that group of people descended from James Colquhoun Colvin (1767–1847), the son of Alexander Colvin (1718–1791) and Elizabeth 'Bettie' née Kennedy (1714–1795). James was a merchant trading between London and Calcutta during the East India Company. This Anglo-Indian family was intimately involved with the British Raj, first as traders and then as administrators and soldiers. Their descendants continued in service to the British Empire and later in some of its constituent countries.
In 1802 James married Maria Jackson (1780–1834) at Fort William, India. Among their children were:
Maria's eldest sister had married a Thomas Binny, who had traded at Madras and retired to St Andrews, Scotland. It was in their household that Bazett, John, and Binny Colvin passed their childhood.
Bazett David Colvin (1805–1871) was the eldest son of James.
In 1840 Bazett married Mary Steuart née Bayley (1820–1902) the daughter of William Butterworth Bayley a director and chairman of the British East India Company from 1834 to 1858. Among their children were:
In 1847 he inherited his father's estate at The Grove, Little Bealing, near Ipswich.
John Russell Colvin (1807 – 1857), the second son of James, rose to be lieutenant-governor of the North-West Provinces of British India during the mutiny of 1857, at the height of which he died.
He married Emma Sophia, daughter of Wetenhall Sneyd, a vicar in England; they had ten children, many of whom continued the family connection with India.
Bazett Wetenhall, Elliott Graham, and Walter Mytton all passed distinguished careers in India, and a fourth, Clement Sneyd, C.S.I., was secretary of the public works department of the India Office in London. The third son, Auckland (1838–1908), was lieutenant-governor of the North-West Provinces and Oudh, and also served in Egypt. He co-founded the Colvin Taluqdars' College in Lucknow; he also published a biography of his father in 1895.