How about:Well, lots of the good names are already taken. WE're going to have to go "out there" to be original. Can't name it after American Indian tribes -- too much possible copyright infringement; besides, the military has that locked up with the naming convention on helicopters.
My first thought would be to use the names of items in physics. Lots of names there that express something small and fast:
Elio Quanta ("A quantum leap in auto design!")
Elio Neutrino
Elio Tachyon
Or we could go rocket based:
Elio Vanguard
Elio Photon