According to Brahmāṇḍapurāṇa (Brahmandapurana), Ūṣmaya(Ushmaya) is a Pitṛgaṇa (Pitrigana; a genus of the forefathers). It is possible that the Pitṛgaṇa called Ūṣmapa(Ushmapa) is referred to as Ūṣmaya (Ushmaya) in a different version.
According to Brahmāṇḍapurāṇa (Brahmandapurana), Ūṣmaya(Ushmaya) is a Pitṛgaṇa (Pitrigana; a genus of the forefathers). It is possible that the Pitṛgaṇa called Ūṣmapa(Ushmapa) is referred to as Ūṣmaya (Ushmaya) in a different version.