Interesting. I call them "hinnfolk" and had four subtypes, based partially on where the person in question was raised, as they're deeply connected to the land they live in. Lightfoot (arboreal hunters and conservationists), Stoutheart (plains-dwelling nomadic herders and gourmands), Cragstep (burrow-dwelling scholars and tinkerers), and Ghostwise (deep cavern-dwelling magicians and psionicists.)
Of course, this is one part of my overall effort to make a more coherent and consistent presentation for this area of mechanics. E.g. all races have four subtypes except humans, because I couldn't come up with four that made sense, I could only manage three (Earthfast, Starbound, and Dual-Bloodline). "Earthfast" would be all humans like those that exist on IRL Earth, those who have cosmologically "stayed home." "Starbound" is for the ones that have been Weirded by Space Magic/Psionics--think elan or slann. And then of course Dual-Bloodline would cover all the various "half human, half X" options, with an eye toward allowing pretty much any binary intermixing someone might want down the line (e.g. not needing it to be "half human, half X", but rather "half X, half Y"), though likely with a sidebar talking about how these options should be used carefully, as some folks may not be super keen on the idea of "half X, half Y" being a formal category that exists in the world.