Valkyries are Nordic, so only Nordic names.
And you have competition in the Shadowyards. Several ships in the Shadowyards fleet are named after Nordic mythos. Mimir, a decapitated head that possesses great knowledge and provides counsel to Odin. The Shadowyards ship, Mimir also possesses the Níðhöggr. Níðhöggr is a serpent that continually attacks the World Tree, Yggdrasil.
Here, have various Nordic mythos. Some are gods, some are characters in the mythos.
Jormungand, the World Serpent.
Midgard, realm of the humans.
Asgard, realm of the gods.
Jotunheim, realm of the Giants.
Ymir, -the- Giant.
Helheim, realm of the dead.
Hel, daughter of Loki and god of Helheim.
Loki, god of mischief and trickery.
Sleipnir, an 8 legged horse.
Thor, god of thunder.
Aesir (correctly, Æsir), the gods.
Vanir, the other gods.
Heimdall, a god and guardian of the Bifrost.
Bifrost, gateway between Midgard and Asgard.
Jotunn, a giant of any kind.
Mjolnir, magic hammer and weapon of Thor. (Name's already used by the Mjolnir Cannon, though.
)
Norns,
Non Organic Rational Nanosystems Seers that watch over people's destinies.
Wyrd, pronounced "weird", one's fate. Also one of the names of the three main Norns (Urðr)
Verdandi (Verðandi), another Norn.
Skuld, another Norn. (P.S, if you click on the cool-sounding name for Norns, those are the three norns, Skuld, Verdandi and Urdr, Urdr being closest to the camera, Skuld the farthest. Why are they different ages? Skuld watches the future, Verdandi, the present and Urdr, the past. Go figure.)
Enough names for now, though.