Srimad-Bhagavatam: Canto 4 - Chapter 1 - Verse 9


बर्हिषत् सुमहाभागो हाविर्धानि: प्रजापति: ।क्रियाकाण्डेषु निष्णातो योगेषु च कुरूद्वह ॥ ९ ॥


barhiṣat sumahā-bhāgohāvirdhāniḥ prajāpatiḥkriyā-kāṇḍeṣu niṣṇātoyogeṣu ca kurūdvaha


The great sage Maitreya continued: My dear Vidura, Havirdhāna’s very powerful son named Barhiṣat was very expert in performing various kinds of fruitive sacrifices, and he was also expert in the practice of mystic yoga. By his great qualifications, he became known as Prajāpati.


In the beginning of the creation there were not many living entities, and consequently the very powerful living entities or demigods were appointed as Prajāpatis in order to beget children and increase the population. There are many Prajāpatis — Brahmā, Dakṣa and Manu are sometimes known as Prajāpatis — and Barhiṣat, the son of Havirdhāna, became one of them.