John Mayer (28 October 1930 – 9 March 2004) was an Indian composer known primarily for his fusions of jazz with Indian music. He was born in Calcutta, Bengal, British India, into an Anglo-Indian family and, after studying with Phillipe Sandre in Calcutta and Melhi Mehta in Bombay, he won a scholarship to London's Royal Academy of Music in 1952, where he studied comparative music and religion in eastern and western cultures.

He worked as a violinist with the London Philharmonic Orchestra (1953–58) and then with the Royal Philharmonic Orchestra (1958–65), but was also composing fusions of Hindustani classical and Western classical forms from 1952 onwards. His Violin Sonata was performed by Yehudi Menuhin in 1955.