Its more than that, the easiest way to see it is to do what myself, Uriel and others have done; read Inheritance, Theodicy and Templar One, and make notes.
Much of it comes from Garious, who is given as an an unreliable narrator, and Tony G, but it does get corroborated.
Enclave is used, not in a general sense, but specifically, as a term for some Jovian settlements. I am guessing, but there is a lot of talk about preserving some form of ideal bloodlines. They do seem the kind of people to practice some kind of eugenics. So Enclave could refer to particular ‘elite’ groups within the larger population. That fits with the standard definition of the word.
The other term that comes up is clade, which means having a common direct ancestor, again harking to the bloodline theme. Cladistically speaking is used in Inheritance for example, almost like a cultural idiom.
In real terms we don’t have a lot to go on, and what we do have is hard to investigate in character. The Slavic connection is nice, and gave me stuff to read I had not really done before but it is an old Earth reference, and that is a myth. For most of the factions, forgotten around 14,500 years ago. and by the Jove in the time of the Shrouded Days, a few thousand years ago.
The Chinese reference is already in. Yan Jung is probably a transliteration of Yan Zheung. Yan is a really common common word in Chinese and Korean, maybe a hundred of more possible meanings. Zheung is a surname, but most likely refers to a Chinese province renowned as the province of the rich and powerful. In that context Yan Jung could mean Beautiful Zheung, but I couldn’t be sure. They might well have packed up shop and become the Jin-Mei.
The Triglavians are hard to nail down. There is the Oruze Osobnyak, a Sleeper site, which means Weapon Storage in Russian, that could be a link, and the Talocan sites are often mixed in with these. The other option, from those we know, are the Enheduanni. They are favourite due to quite a few pointers as Uriel has pointed out.