Dattopant Bapurao Thengadi, (10 November 1920 – 14 October 2004) was an Indian Hindu Ideologue, trade union leader, and founder of the Swadeshi Jagaran Manch, Bharatiya Mazdoor Sangh and the Bharatiya Kisan Sangh. He was born in the village of Arvi in Wardha district in Maharashtra.
- I have had long association with Thengadiji. I was present in the Bhopal meeting in which the decision to form the BMS was taken. During the discussion to decide the name of the new organisation, Thengadiji had suggested the name Shramjivi Sangathan. The name Bharatiya Mazdoor Sangh was coined keeping in view the fact that the name should be simple and meaningful. I feel trade unionism is facing a crisis today. We have before us two paths, one of these is on the way out. There is a need to find out the third one. Workers' interests should be protected but at the same time the nation's interest too must be borne in mind. The workers' movement is in a crisis and how to balance things in a changing scenario should be considered using the third way out, which was what Thengadi had been attempting. Whatever Thengadiji has written should be read by all of us. I feel it will guide us for long.
- Atal Bihari Vajpayee, The Organiser, 31 October 2004 issue. p. 13, Article Named- 'His writings will guide us' 
- I have had close relations with Dattopantji for the last 50 years. If one has to explain the personality of Dattopantji in one sentence, we can say that he was a dedicated Rashtrasevak.He lived his whole life as a karmayogi. The work he took up he aimed it out with full responsibility. He established a wide network of friends without compromising on his views and ideology. His thinking was not confined to labourers or economic issues alone it involved the entire life of the nation and the world. His death is a personal loss to me. A strong pillar of our work is no more.
- L.K. Advani, The Organiser, 31 October 2004 issue. p. 13, Article Named- Dedicated Rashtrasevak 
- [The approach of the BMS (founded by Thengadi)] to labour relations and economic policy is roughly that of the Christian-Democratic trade-unionists in Europe...
- About the Bharatiya Mazdoor Sangh (BMS). Elst, Koenraad (2001). Decolonizing the Hindu mind: Ideological development of Hindu revivalism. New Delhi: Rupa. p. 154