Śrīla Viśvanātha Cakravartī Ṭhākura states that the seven gopīs mentioned so far in this chapter are the first seven of the eight principal gopīs, whose status allowed them to immediately approach Śrī Kṛṣṇa upon His reappearance. The ācārya quotes a verse from the Śrī Vaiṣṇava-toṣaṇī that gives the names of these seven as Candrāvalī, Śyāmalā, Śaibyā, Padmā, Śrī Rādhā, Lalitā and Viśākhā. The eighth is understood to be Bhadrā. Śrī Vaiṣṇava-toṣaṇī itself quotes a verse from the Skanda Purāṇa that declares these eight gopīs to be the principal among the three billion gopīs. Detailed information about the hierarchy of gopīs is available in Śrīla Rūpa Gosvāmī’s Ujjvala-nīlamaṇi.

The Padma Purāṇa confirms that Śrī Rādhā is the foremost of the gopīs:

yathā rādhā priyā viṣṇos
 tasyāḥ kuṇḍaṁ priyaṁ tathā
sarva-gopīṣu saivaikā
 viṣṇor atyanta-vallabhā

“Just as Śrīmatī Rādhārāṇī is most dear to Kṛṣṇa, Her bathing pond is similarly dear. Of all the gopīs, She is the most beloved of the Lord.”

The Bṛhad-gautamīya-tantra also names Śrīmatī Rādhārāṇī as Kṛṣṇa’s foremost consort:

devī kṛṣṇa-mayī proktā
 rādhikā para-devatā
sarva-lakṣmī-mayī sarva
 kāntiḥ sammohinī parā

“The transcendental goddess Śrīmatī Rādhārāṇī is the direct counterpart of Lord Śrī Kṛṣṇa. She is the central figure for all the goddesses of fortune. She possesses all attractiveness to attract the all-attractive Personality of Godhead. She is the primeval internal potency of the Lord.” (This translation is Śrīla Prabhupāda’s English rendering of Caitanya-caritāmṛta, Ādi 4.83.)

Additional information about Śrī Rādhā is given in the Ṛg-pariśiṣṭa (the supplement to the Ṛg Veda): rādhayā mādhavo devo mādhavenaiva rādhikā/ vibhrājante janeṣu. “Among all persons, it is Śrī Rādhā in whose company Lord Mādhava is especially glorious, as She is especially glorious in His.”