SB 8.1.19

svārociṣo dvitīyas tu
 manur agneḥ suto ’bhavat
dyumat-suṣeṇa-rociṣmat
 pramukhās tasya cātmajāḥ
Synonyms: 
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
ṛṣayo ’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 demigods created by Dakṣa, and the ṛṣis like Marīci were all partial incarnations of the Lord during the reign of Svāyambhuva Manu. During that time, the incarnation of the Lord as Yajña took charge of ruling the heavenly planets. The next Manu was Svārociṣa. The Manus and the sages and demigods are further described in the following eleven verses.