Gopinatha Simha
Sri Caitanya-caritamrta
CC Adi-lila
CC Adi 10.76, Translation and Purport:
Gopīnātha Siṁha, the thirty-eighth branch of the tree, was a faithful servant of Lord Caitanya Mahāprabhu. The Lord jokingly addressed him as Akrūra.
Actually he was Akrūra, as stated in text 117 of the Gaura-gaṇoddeśa-dīpikā.