According to Vāyupurāṇa (Vayupurana) and Brahmāṇdapurāṇa (Brahmandapurana), Ādarśa(Adarsa) is one of the sons of Sāvarṇi (Savarni) Manu in the eleventh Manvantara, in future.

Vāyupurāṇa(100.84)
Brahmāṇḍapurāṇa (Maharṣi)(3.1.81)