Ratanji was born in
Navsari in the
Bombay Presidency in 1856 to Dadabhoy Kawasji Tata and Bhikhibai Tata. Dadabhoy was the son of Kawasji Maneckji Tata and grandson of Maneckji Tata. They were all members of the extended Tata family. Dadabhoy's sister, Jeevanbai, was married to Nusserwanji Ratanji Tata (a distant relative). Their son was
Jamsetji Tata. Ratanji studied at the
Cathedral and John Connon School and
Elphinstone College in
Bombay. After graduating, he took up a course in
agriculture in
Madras. He then joined his family trade in the East Asia. Ratanji was married to a Parsee woman at a young age. However, she died childless not long after the marriage. Ratanji was in his forties when he married a French woman,
Suzanne Brière, in 1902. This was considered revolutionary in his times and was not welcomed by many in the Parsi community. They had five children: Rodabeh,
Jehangir, Jimmy, Sylla and Dorab. ==Opium trade==