Sir Dinshaw Maneckji Petit, 1st Baronet (30 June 1823 - 5 May 1901), Parsi entrepreneur and founder of the first textile mills in India. He was also the grandfather of Rattanbai Petit Jinnah, who later became the wife of the founder of Pakistan, Mr. Mohammed Ali Jinnah.
In 1854 Dinshaw Maneckji Petit founded the "Persian Zoroastrian Amelioration Fund" with the aim of improving the conditions for the less fortunate Zoroastrian co-religionists in Iran. The fund succeeded in convincing a number of Iranian Zoroastrians to emigrate to India (where they are today known as Iranis), and may have been instrumental in obtaining a remission of the jizya poll tax for their co-religionists in 1882.
In 1886 he became a member of the governor-general's legislative council. He devoted his wealth to philanthropic objects, among the public and private charities which he endowed being the Towers of Silence and fire temples of the Parsi, a hospital for animals, a college for women, and the Petit hospital.
For the advancement of technical education, Sir D. M. Petit also donated premises worth Rs. 3,00,000 at Byculla, Bombay to the famous Victoria Jubilee Technical Institute (VJTI) (recognised by the Government of Bombay as the Central Technological Institute, Bombay Province). In winter 1923, that institute relocated to its present location in Matunga, Bombay.
The Petit surname is not traditionally Parsi and had come about in Sir Dinshaw's great grandfather's time in the 1700s. He had worked as a shipping clerk and interpreter for the British East India Company. French merchants who dealt with the lively, short Parsi clerk called him 'le petit Parsi'.
Sir Dinshaw was survived by Sir Dinshaw Petit (2nd Baronet).