Aghar Singh of Laungowal (d. 1764) was, according to Giani Gian Singh, Panth Prakash, one of the seven sons of Bhal Nagahia, a Dullat Jatt of Laungowal, in present-day Sarigrur district of the Punjab. He received amrit, the Khalsa rites of initiation, from his uncle Bhal Mam Singh, then high priest of the Harimandar at Amritsar. He, along with his brother Tharaj Singh, fought against the Mughals in Amritsar and avenged the execution of Bhal Man! Singh by slaying his tormentors. He also confronted and killed Mir Momin Khan of Kasur who, after the death in November 1753 of Mir Mannu, the governor of the Punjab, had launched a renewed campaign of persecution against the Sikhs.
Aghar Singh died in January 1764 at Sirhind fighting against the provincial governor, Zain Khan.
- Gian Singh, Giani, Panth Prakash. Patiala, 1970