1. Kēta or Kēn
Kēta comes from the the Kqān. It represents the first of the Three Worlds, which is the Divine everything. Unity of everyone and everything, of all time, all space, all realities, all life. Everything.
2. Nāga or Ngēn
Nāga comes from Ngān, which is the second of Three Worlds, which is this part of the universe, the spiritual realms and layers and worlds of the physical plane. The structures of the universe that separate it out so that life experiences existence in a linear fashion, with linear time and three dimensional space.
3. Nēna or Nēn
Nēna comes from the letter Nān, which is the third of the Three worlds, which is just the physical world and its closest spiritual realms.