This will be one of the least remixed of any of the territories. I enjoy the notion of a bunch of seafaring warlords on a jagged coast and archipelago. Although it has some of the feel of classic Golden Age of Piracy in the Caribbean, the territory itself is more like the northern shores of Europe, giving it a strange hybrid feel between pirates and vikings. I'm going to assume that like the coast of northern Europe and the British Isles, warm water currents keep the climate more moderate than you'd otherwise see, so everything from the seafaring early Celtic peoples who crossed the channel or the Irish Sea to seafaring Anglo-Saxons and Vikings are a better analog in most senses than actual Golden Age of Piracy from the tropics. Because it's also the place where the original Nordic Sarlonan phenotype is strongest, being the place where they originally invaded, that makes it even more explicitly true. Hardly any Old Folk genetics is present, and most of it more recently arrived anyway.
I also like the idea that it is a magnet for the otherwise dispossessed or those who don't fit in elsewhere. In spite of the fact that it's on the complete opposite side of the continent from the Daemon Wastes, many kemlings will have fled, in their diaspora from fallen Bael Turath, to the Lhazaar Principalities, for example. Many changelings make their home here too, especially those who wish to live openly as changelings instead of in disguise as a member of some other race. And, it's also a place where the undead can hide with more impunity than in the more settled areas of the continent. But I don't want to talk too much about my plans for the Blood of Vol, for instance, until we get to the Organizations chapter further down.
That said, of course there will have to be some remixing of the population breakdown percentages, if nothing else.
Lhazaar Principalities population remixed
Human: 55%
Goblin: 12%
Kemling: 11%
Orc: 9%
Changeling: 7%
Seraphim: 2%
Other: 4%