In "[Where Silence Has Lease][1]", the Enterprise is trapped in a "void" by an entity which addresses itself as Nagilum. Is "Nagilum" the creature's name, or is it the species' name? Or perhaps both (as is apparently true with the Q)?

![enter image description here][2]


  [1]: http://en.memory-alpha.org/wiki/Where_Silence_Has_Lease_(episode)
  [2]: https://i.sstatic.net/Tr2qi.jpg