SB 12.11.21

vāsudevaḥ saṅkarṣaṇaḥ
 pradyumnaḥ puruṣaḥ svayam
aniruddha iti brahman
 mūrti-vyūho ’bhidhīyate
Synonyms: 
vāsudevaḥ saṅkarṣaṇaḥ pradyumnaḥ — Vāsudeva, Saṅkarṣaṇa and Pradyumna; puruṣaḥ — the Supreme Personality of Godhead; svayam — Himself; aniruddhaḥ — Aniruddha; iti — thus; brahman — O brāhmaṇa, Śaunaka; mūrti-vyūhaḥ — the expansion of personal forms; abhidhīyate — is designated.
Translation: 
Vāsudeva, Saṅkarṣaṇa, Pradyumna and Aniruddha are the names of the direct personal expansions of the Supreme Godhead, O brāhmaṇa Śaunaka.