Agham lohana is described in the Chachnama as a chief and ruler of Brahmanabad; he is also noted to have controlled other adjacent territories known as Lakha and Sama. He is estimated to have ruled around 636 AD. Agham lohana was a chieftain of caste and professed Buddhism
Chach after consolidating his hold on Alor began expansion of his territories and asked Agham lohana to surrender; however, conflict broke out between the two, and Agham was killed. His son was established as governor of Brahmanabad, but Chach's forces occupied the lands formerly ruled by Agham lohana.
Chach married Agham’s widow in a political maneuver, and likewise wed his own niece to Agham’s son Sarhand. Further, Chach laid restrictions on Jats,  to reduce the potential for resistance and to lower their social status; among these were bans on riding saddled horses, wearing silk and velvet, wearing headgear, and carrying weapons. The Jats were also forced to wear black and red scarves.
The town of Agham Kot is named after Agham lohana.