Kraata Prefixes?

What logic was used when deciding the Kraata prefixes? Because while Vorahk and Kraata-Vo go together well, Turahk and Kraata-Za do not. It’s been bugging me for a while.

We used what we were legally allowed to use. Some things we suggested as prefixes got rejected because they were already owned by someone else.

What was rejected, and why? Was there a system you used?