SARDAR THARAJ SINGH, an eighteenth century Dullat Jat warrior, was one of seven sons of Bhai Nagahia* grandson of Bhai Kala of Laungowal. Receiving the vows of Khalsa discipline at the hands of Bhai Mani Singh, he chose to stay with him at Amritsar to defend the Harimandar against the onslaughts of the Mughals and Afghans. Tharaj Singh attended on Nawab Kapur Singh Virk as his bodyguard and obtained from him a command of 100 soldiers. He fought in the battle of Sirhind (1764) at which he is said to have cut off the head of the Faujdar Zain Khan. When Nawab Khushal Singh, nephew and successor of Nawab Kapur Singh, carved out for himself the Singhpuria principality, he put Tharaj Singh in charge of Bharatgarh, one of the major towns within his territory. Tharaj Singh died fighting for his chief in one of his battles of conquest.
- Gian Singh, Giani, Sri Guru Panth Prakash [Reprint]. Patiala, 1970