In Anuśāsanaparva(Anusasanaparva) of Mahābhārata (Mahabharata), the names of the sons of Viśvāmitra(Viswamitra) have been mentioned. Āsurāyaṇa(Asurayana) is one of them.

Mahābhārata (Kinjawadekar)(13.4.56)
Mahābhārata Vols. 1-43 (Siddhāntabāgīśa)(13.3.75)