Bhatnagar is a common surname used in mostly northern India among the Kayastha caste of Hindus. They came from the Second son of the first wife of Lord Chitragupta the recordkeeper of the Yama the God for death.[citation needed]
Notable Bhatnagars include
- Raja Todar Mal, Indian Mughal emperor Akbar’s finance minister
- Shanti Swaroop Bhatnagar, Padma Bhushan scientist
- Deepti Bhatnagar, former runner-up, Miss India
- Prabhu Lal Bhatnagar - Padma Bhushan scientist
- Ranjit Bhatnagar, a game designer
- Shivani Bhatnagar, a noted jounalist, whose murder became a famous scandal.
- S K Bhatnagar was a former defence secretary of India and also been Governer of Sikkim state of India.
- Prabhu Lal Bhatnagar (1912-08-08 -1976-10-05) commonly addresed as P. L. Bhatnagar was an Indian mathematician known for his contribution to the Bhatnagar-Gross-Krook (BGK) collision model used in Lattice Boltzmann methods (LBM).