Ooh Ooh I got it. Chrono'99's tempus joke gave me an idea. I went to a Latin translator and looked up time, and got this.
Unus: one, only one, at the same time; single, alone, unparalleled.
Or when I looked up "same" I got.
Eadem: the same
Or
Zeit: German for time
Unus has a nice ring to it, and some interesting plot implications. That Crio idea might work too. I think we may need a poll when we get enough good ideas. Krono probably won't work just for conversation sake. "Wait, is that the Krono with a K or Crono with a C." He needs something a little more unique.