Renamed. Zhan-Khaz and Zium-Khaz are now the names of two dwarven sub-races, each with a different flavor. While I will leave it to you to discover all of their differences, know that their names translate to Bronze Dwarves and Grey Dwarves, and they will come from different corners of the map. The Zium-Khaz will be most familiar to you while the Zhan-Khaz just never got into that newfangled 'steel' fad their northern cousins got into. They found ways to push bronze alloys to new limits and can hold their own with different weapons to suit their properties.

As for the Khezi? Well you didn't think dwarves popped out of the ground, did you? The Khezi are rare, only about one in four, and as such a traditional fortress keeps them safely guarded along with their children. Consider assigning them rooms first and giving them roles in taverns and temples, rather than risking them to carp, cave-ins and combat. After all, they are not only the future of your fortress, but your entire civilization.