Damn, good point. OK, sooooo....What if Hades is somehow the progenitor of the White Court? Their official Court Language is from the right general region. Maybe the spirit half of that particular breed of "half-born" was a greco-roman something?
Im reaching hard for something, help me out
I don't know what kind of research Jim did before he chose Etruscan as the native language of the White Court, but I know they predate the Romans and according to the wiki article I found on them their civilization may have had some ancient Greek influences. By ancient Greek I mean Homer and the Trojan War era Greeks, not the later more advanced city states era with people like Pericles, Leonidas, Socrates and Plato.
There is something I do remember about the Etruscans from a history class I took which could relate to White Court. The historian and story teller Herodotus; sometimes referred to as the Father of History and at other times as the Father of Lies, was widely traveled and was shocked by the behavior of Etruscan women. In Athens women were decidedly second class citizens. If you; assuming you're a man, was invited to diner at someones home, you wouldn't see the women of the house unless they were slaves serving the diner. A man's wife and daughters were kept cloistered most of the time. (The same isn't true in Sparta, but they were really weird in other ways.) If you were a women invited to the same Athenian diner, you were most likely a Hetaira, essentially a highly paid courtesan. Etruscan women on the other hand seemed to enjoy a measure of equality with their male counterparts. At a similar diner they would talk politics and the news of the day along with the men; and if Herodotus is correct, their ideas and opinions were no less to be held valid then the men's. More importantly, Etruscan women had distinct legal rights and could pass down their names and titles to their children. The Romans and Greeks said Etruscan women were lewd and lascivious because they did scandalous things like going out in public unattended by men, getting under the same blanket their husband was using at a winter banquet, and they rode horses and some had their own chariots, shocking!
So an ancient civilization were women have some degree of equality. A perfect example for someone who wants to seize power like Lara or; I can't remember her name, the late head of Malvora clan. It makes the White Court's emergence in that place and era seem plausible.