Athiyamān (also known as Adigamān or Satyaputra-Atiyān) were a famous royal Tamil dynasty of the Velir royal house. These king-chiefs ruled from their capital Tagadur from at least the 3rd century BCE. The Velir royal house was one of the four kingdoms of Tamilakkam, ruling parts of the Kongu country. They were surrounded by the Cheras to the west and the Pandyas and Cholas to the east.
The Athiyamans are mentioned in the Puranas as well as in ancient Tamil literature. Their rule of Tamilakkam is mentioned in rock inscriptions of the Sangam period such as the Edicts of Asoka in the 3rd century BCE and the Gummireddipura plates with the added title Satyaputra - the "members of the fraternity of truth", synonymous with the Velir clan. A number of inscriptions in Jambai in Tirukkoyilur taluk add details of their sovereignty in the first century CE. This ruling tribe rose in prominence during the classical period of the history of Tamil Nadu. Their most famous ruler was Athiyamān Nedumān Añci, a powerful king who was one of the Kadai ezhu vallal (7 great patrons) of arts and literature in ancient Tamilakam. His son Elini ruled Kudiramalai of the ancient Jaffna kingdom and Vanni, a co-ruling contemporary of the famous king Korran. These kings belonged to a prolific Tamil horseman tribe.
Asoka mentions the Satyaputras Velir clan in his inscriptions along with the Cholas, Pandyas and the Kerala putras. The Satyaputra Velirs wielded sufficient power in the time of Asoka (3rd century BCE) almost on par with the Cheras, Cholas and Pandyas.
Ye Ca anta ata Choda, Pandiya, Satiyaputo, Ketalaputo, Tam bapanni, Antiyogo naama, Yonalaja
Everywhere in the conquered dominions of king Priyadarsin, the beloved of the gods, and the dominions on the borders as those of the Chola, the Pandya, the Satiyaputra, the Cheralaputra, Tamraparni, the Yavana King named Antiyoka and the other neighbouring kings of this Antiyoka...
The abode given by Athiyan Nedumān Añji, the Satyaputō
The inscription mentions the Athiyā Chief Neduman Anci, a heroic historic king celebrated in volumes of the Sangam literature classics Purananuru and Akananuru. This Athiymān king was a descendent of the Velir dynasty mentioned in Asoka's edicts. The inscription records the endowment of a cave-shelter by the chieftain Atiyan Netuman Anci who sports the title Satiyaputo. The inscription gives the name of his clan (Atiyan), of his father (Netuman) and of himself (Anci). This clear statement enables researchers with absolute certainty, to identify a chieftain mentioned in the Tamil Sangam literature with a personage figuring in a Tamil-Brahmi inscription.
The Satyaputra-Athiyamān Velirs wielded sufficient power in the 3rd century BCE to be considered on par with the Cheras, Cholas and Pandyas, a power which continued for the next four centuries.
The Gummireddipura plates make mention of the Satyaputra Adigaman dynasty.