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

Vāyupurāṇa(100.84)
Brahmāṇḍapurāṇa (Maharṣi)(3.1.81)