Though the Gaura-ganoddesha-dipika here indicates that Minaketan and Rama Das are two different people, it is clear from the Chaitanya Charitamrita and the Bhakti-ratnakara that Minaketan Rama Das is one single individual. Perhaps both Nishatha and Ulmuka, participants in Baladeva-lila, entered into the body of Minaketan Rama Das during Gaura-lila. – See more at: http://gaudiyahistory.com/minaketana-ramadasa
