Kokytic ore powering Sulph-Orc ships. Related to Cocytos, one of the rivers of Hades?
Nixian race. Related to the drowning water spirits (Nixies)?
Zairichi, Neo-Elf assassin. Related to a Zoroastrian holy woman?
Boroghul, the Ragged. Related to Genghis Khan's adopted brother?
Khorijin, the other Sulph-Orc. Also has a Mongolian name.
Sulph-Orcs, in general, seem to have a very Mongolian feel, down to the "Tydanic Horde."
Euphrosyne, de facto leader of the Conclave of Niphon. Shares a name with one of the Three Graces, specifically Joy. Also, with a quick use of Google, Niphon is also the name of a Greek Orthodox saint.
Uxshenti, another Neo-Elf. Another Zoroastrian holy woman.
Vigilance, Favia's ship. No mythology or true culture here. Just looks like the barrel and slide of a Desert Eagle.
Vognild Prime? Yeah, I know the background there. :-)
Alright. What did I miss?
EDIT: Forgot to mention the Dwarf/Norse connection. Not my area of expertise, though.