CC Ādi 10.138

īśvara-purīra śiṣya — brahmacārī kāśīśvara
śrī-govinda nāma tāṅra priya anucara
Word for word: 
īśvara-purīra śiṣya — disciple of Īśvara Purī; brahmacārī kāśīśvara — Brahmacārī Kāśīśvara; śrī-govinda — Śrī Govinda; nāma — name; tāṅra — his; priya — very dear; anucara — follower.
Translation: 
Brahmacārī Kāśīśvara was a disciple of Īśvara Purī, and Śrī Govinda was another of his dear disciples.
Purport: 

Govinda was the personal servant of Śrī Caitanya Mahāprabhu. In the Gaura-gaṇoddeśa-dīpikā (137) it is stated that the servants formerly named Bhṛṅgāra and Bhaṅgura in Vṛndāvana became Kāśīśvara and Govinda in Caitanya Mahāprabhu’s pastimes. Govinda always engaged in the service of the Lord, even at great risk.