sei nanda-suta--ihan caitanya-gosani
sei baladeva--ihan nityananda bhai
sei nanda-suta—the same son of Nanda Maharaja; ihan—now; caitanya-gosani—Caitanya Mahaprabhu; sei baladeva—the selfsame Baladeva; ihan—now; nityananda bhai—Nityananda Prabhu, the brother of Sri Caitanya Mahaprabhu.
The former son of Nanda Maharaja is now Sri Caitanya Mahaprabhu, and the former Baladeva, Krsna's brother, is now Nityananda Prabhu, the brother of Lord Caitanya.
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