CC Madhya 10.102

āra dine āilā svarūpa dāmodara
prabhura atyanta marmī, rasera sāgara
Word for word: 
āra dine — next day; āilā — came; svarūpa dāmodara — Svarūpa Dāmodara; prabhura — of Śrī Caitanya Mahāprabhu; atyanta — very; marmī — intimate friend; rasera — of transcendental mellows; sāgara — ocean.
Translation: 
Svarūpa Dāmodara also arrived the next day. He was a very intimate friend of Śrī Caitanya Mahāprabhu’s, and he was an ocean of transcendental mellows.
Purport: 

“Svarūpa” is one of the names of a brahmacārī in Śaṅkarācārya’s disciplic succession. In the Vedic discipline there are ten names for sannyāsīs, and it is customary for a brahmacārī assisting a sannyāsī of the designation Tīrtha or Āśrama to receive the title Svarūpa. Dāmodara Svarūpa was formerly a resident of Navadvīpa, and his name was Puruṣottama Ācārya. When he went to Vārāṇasī, he took sannyāsa from a sannyāsī designated Tīrtha. Although he received the title Svarūpa in his brahmacārī stage, he did not change his name when he took sannyāsa. Actually as a sannyāsī he should have been called Tīrtha, but he chose to retain his original brahmacārī title of Svarūpa.