In the Adi-lila, Tenth Chapter of Sri Caitanya-caritamrita, Srila Kaviraja Gosvami has given a description of the many expansions of the Caitanya tree, the branches and the sub-branches. So all these very dear, intimate devotees of Sri Caitanya Mahaprabhu they know Gauranga Mahaprabhu and they know Krishna.

If you are very greedy, very eager to have sadhu-sanga, sat-sanga, the association of grantha-bhagavata and bhakta-bhagavata, first of all you have to give up duhsanga or asat-sanga. What is association? One may say that to come in close proximity to a person is association. But that is not the fact. Association takes place in the mind, in the heart. As long as there are desires for material enjoyment, desires for liberation, desires for mystic perfections, and other desires in your heart, then you are doing asat-sanga.