The Green Man would probably be Spring. Rebirth, growing, the natural time for things to become alive or awaken, etc. If so, there's your Spring Court (and since I like the idea of it, your Regulator Spring Court).
I think it's the Easter Bunny!
Though in all seriousness, Neil Gaiman's American Gods has Easter as a character, and it talks a bit about her transformation through the ages. Well worth a read, not only for this thread.