Unversed

The Unbirths are the enemes Terra, Ven and Aqua will face in the upcoming Kingdom Hearts: Birth by Sleep. Not Much is known at the time.

Timeline
Although little information is available, these creatures have been told to be extinct, although KH1 only occurs 10 years later. They have also been linked to both Heartless and Nobodies, as neither existed during the time of the Unbirths.

Meaning
The name Unbirth resembles the words "Nobody" and "Heartless in a certain manner, like so:

Nobody = Bodyless Heartless = Without hearts Unbirth = Not born Their way of production could be connected to Nobodies and Heartless.