Agnivarcas (Agnibarcāḥ)[Agnichas (Agnivarchah)] is the name of a sage who was one of the six disciples of Romaharṣaṇa (Romaharshana), the storyteller. 

Viṣṇupurāṇa(3.6.17)
Brahmāṇḍapurāṇa (Maharṣi)(1.35.64)