Xozhixi was the ancient Vratix name for the capital city of the planet Thyferra. In the decade prior to the Clone Wars—the time known to the Vratix as Alazhixazha—the city regained its ancient name for the first time in a thousand years.
Sources
Thyferra: Bacta Basics on Wizards.com (backup link) (original site is defunct) (First mentioned)- The Force Unleashed Campaign Guide
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