This is Nammalvar, one of the important Vaishnavite saints. This site has two other blogs on Nammalvar.

Summary: The twelve Alvars belonging to the Vaishnava faith were responsible for, among other things, the Vaishnava Bhakti movement in Tamil Nadu and nearby areas. This Vigraha is that of Nammalvar, one of the twelve alvars.

Though chronologically Nammalvar was not the first Alvar, he is considered the first among equals of the twelve alvars. Whereas other alvars are incarnations of various attributes or objects associated with Vishnu, Nammalvar is said to be an incarnation of Tirukkungudi Vishnu.

What is interesting about this bronze is the Prabhavali. It is full of deities, primarily Vishnu. The deities included are Krishna with a ball of butter in his right hand, Vishnu accompanied by seated consorts Sri Devi and Bhu Devi, Anjaneya, Vishnu as Anantasai accompanied by Sri Devi and Bhu Devi, Standing Vishnu, Garuda in Anjali mudra (?) and seated Lakshmi.

It is not often you come across Hindu bronzes with so many deities on the Prabhavali. Such depictions are more common in Jaina bronzes.

One of the unusual features of this bronze is the depiction of Sri Devi and Bhu Devi seated while their male consort, Vishnu, is standing. There are examples of such iconography; Sri Rangam Utsava Murthy is one. Thanks to Ranganath for this information.

The engraving is detailed, though not very refined. The two slots on either side are meant for Nammalvar’s disciples, Madhura Kavi Alvar and Sri Ramanuja Acharya.

This bronze is from the Telugu-speaking area, and it is probably one hundred years old. This Vigraha is about 17 cm tall.

What prompted the artists to arrive at this composition is a matter for discussion and speculation.