I think I remember some of the answer we came up with. Correct me if I'm wrong though:
according to Arnval in Battle Rondo, Arnval means "Ambush" in Italian. I don't trust that, since it's a phrase in japanese I only manage to pick up pieces of the words. On the other hand, I notice the word "Arnval" seems to be something mathematical to it.
could be the Chinese for "cat"(貓, MAO) and "claw"(爪, CHOW)
Waffe is German for "weapon", ie "Weapon Bunny"
according to wikipedia: "The xiphos (Greek: ξίφος) is a double-edged, single-hand sword used by the ancient Greeks"
someone need to expand it more, but I remember we found Eukrante to be the name of one of the mythical children of gods, associated with the sea.
Waffedolphin - Waffe is German for "weapon", ie "Weapon Dolphin"
Asuka (飛鳥) -
No idea if it's correct at all, but the kanji 飛鳥, if viewed as Chinese, is "fly"(飛) and "Bird"(鳥), which seems to match her flying theme pretty well.
Zelenograd, a city in Russia, possibly the origin of Zelnograd's name.