CC Ādi 10.106

śaṅkarāraṇya — ācārya-vṛkṣera eka śākhā
mukunda, kāśīnātha, rudra — upaśākhā lekhā
Word for word: 
śaṅkarāraṇya — Śaṅkarāraṇya; ācārya-vṛkṣera — of the tree of ācāryas; eka — one; śākhā — branch; mukunda — Mukunda; kāśīnātha — Kāśīnātha; rudra — Rudra; upaśākhā lekhā — they are known as subbranches.
Translation: 
The ācārya Śaṅkarāraṇya was considered the forty-eighth branch of the original tree. From Him proceeded the subbranches known as Mukunda, Kāśīnātha and Rudra.
Purport: 

It is said that Śaṅkarāraṇya was the sannyāsa name of Śrīla Viśvarūpa, who was the elder brother of Viśvambhara (the original name of Śrī Caitanya Mahāprabhu). Śaṅkarāraṇya expired in 1432 Śakābda (A.D. 1510) at Sholapur, where there is a place of pilgrimage known as Pāṇḍarapura. This is referred to in the Madhya-līlā, chapter nine, verses 299 and 300.

Śrīla Bhaktisiddhānta Sarasvatī Ṭhākura writes in his Anubhāṣya, “Lord Caitanya Mahāprabhu opened a primary school in the house of Mukunda, or Mukunda Sañjaya, and Mukunda’s son, whose name was Puruṣottama, became the Lord’s student. Kāśīnātha arranged the marriage of Lord Caitanya in His previous āśrama, when His name was Viśvambhara. Kāśīnātha induced the court paṇḍita, Sanātana, to offer Viśvambhara his daughter. In text 50 of the Gaura-gaṇoddeśa-dīpikā it is mentioned that Kāśīnātha was an incarnation of the brāhmaṇa Kulaka, whom Satrājit sent to arrange the marriage of Kṛṣṇa and Satyabhāmā, and in text 135 it is mentioned that Rudra, or Śrī Rudrarāma Paṇḍita, was formerly a friend of Lord Kṛṣṇa’s named Varūthapa. Śrī Rudrarāma Paṇḍita constructed a big temple at Vallabhapura, which is one mile north of Māheśa, for the Deities named Rādhāvallabha. The descendants of his brother, Yadunandana Vandyopādhyāya, are known as Cakravartī Ṭhākuras, and they are in charge of the maintenance of this temple as sevaits. Formerly the Jagannātha Deity used to come to the temple of Rādhāvallabha from Māheśa during the Ratha-yātrā festival, but in the Bengali year 1262 [A.D. 1855], due to a misunderstanding between the priests of the two temples, the Jagannātha Deity stopped coming.”