Ranbaxy was started by Ranbir Singh and Gurbax Singh in 1937 as a distributor for a Japanese company Shionogi. The name Ranbaxy is a combination of the names of its first owners Ranbir and Gurbax. Bhai Mohan Singh bought the company in 1952 from his cousins Ranbir and Gurbax. After Bhai Mohan Singh's son Parvinder Singh joined the company in 1967, the company saw an increase in scale.