30
Śrīmad-Bhāgavatam
[Canto 8, Ch. 1
PURPORT
The various names of the demigods—Lord Brahmā, Lord Śiva, Lord Indra and so on—are not personal names; they are names of different posts. In this regard, we understand that Lord Viṣṇu sometimes becomes Brahmā or Indra when there is no suitable person to occupy these posts.
TEXT 19
स्वारोचिषो द्वितीयस्तु मनुरग्रेः सुतोऽभवत् । 
    द्युम्तसुषेणरोचिष्मत्प्रग्रुखास्तस्य चात्मजाः ॥१९॥
svārociṣo dvitīyas tu 
    manur agneḥ suto 'bhavat 
    dyumat-suṣeṇa-rociṣmat 
    pramukhās tasya cātmajāḥ
svārociṣaḥ—Svārociṣa; dvitīyaḥ—the second; tu—indeed; manuḥ—Manu; agneḥ—of Agni; sutaḥ—the son; abhavat—became; dyumat—Dyumat; suṣeṇa—Suṣeṇa; rociṣmat—Rociṣmat; pramukhāḥ—beginning with them; tasya—of him (Svārociṣa); ca—also; ātma-jāḥ—sons.
TRANSLATION
The son of Agni named Svārociṣa became the second Manu. His several sons were headed by Dyumat, Suṣeṇa and Rociṣmat.
PURPORT
manvantaraṁ manur devā 
    manu-putrāḥ sureśvaraḥ 
    rṣayo 'ṁśāvatāraś ca 
    hareḥ ṣaḍ vidham ucyate
There are many incarnations of the Supreme Personality of Godhead. Manu, the  manu-putrāḥ  (the sons of Manu), the king of the heavenly planets, and the seven great sages are all partial incarnations of the Supreme Lord. Manu himself, his sons Priyavrata and Uttānapāda, the