Jamnalal Bajaj (04 November 1889 – 11 February 1942) was an Indian industrialist, a philanthropist, and Indian independence fighter.He founded the Bajaj Group of companies in the 1920s, and the group now has 24 companies, including six that are listed on the bourses. He was also a close and beloved associate of Mahatma Gandhi, who is known to have often declared that Jamnalal was his fifth son.