CC Madhya 6.18
mahāprabhura bhakta teṅho prabhu-tattva-jñātā
Gopīnātha Ācārya was a resident of Nadia, the son-in-law of Viśārada and a devotee of Caitanya Mahāprabhu. He knew the true identity of His Lordship.
Maheśvara Viśārada was a classmate of Nīlāmbara Cakravartī’s. He lived in the Nadia, district in a village called Vidyānagara, and had two sons named Madhusūdana Vācaspati and Vāsudeva Sārvabhauma. His son-in-law was Gopīnātha Ācārya.