Terran-ixians. I can fill this part in, I kept up to speed with the EY.
The Terran-Ixians were one of the Nameless' vassal races that broke free, Terran being a suffix for slave or something like that in Nameless tongue if I recall correctly.
Terran-Ixians then either created or somehow got involved with the Orealyans, which when the Ixians left became the Orealyanis.
Sorry, Yuu, if any of this is off, I'm working off of memory. Trying to save you a bit of work
