Capital cities are bold, regular ones are not.
Cassiopeia, Andromeda, Ophiuchus, Asphyxion, (Theme: Graeco-Roman constellations)
Cloud City, Zephyr, Stratos, Tropos (theme: air/atmosphere)
Moord, Middleknot (Based on Middernacht, Dutch for midnight and a great song), Heel (the Dutch word for Transylvania, ironically similar to "hell") Nesangro (theme: Dutch)
Necropolis, Golgotha, Sepulcheria, Polyandrium (theme: synonyms for graveyard)
Rokk, Stone Town, Thin Man's Pass, The Pits (theme: names of local mountain landmarks)
Anarchia, Chaos Rifts, Hostility, Law (Synonyms for chaos, "law" is ironic)
Burning City, Hell's Gate, Feuer, Volcanic Isle (Theme: stuff I didn't come up with)
The Cliffside, Core, Achromasia Caverns (Literally, Caverns of the Albinos), Levity (A weird city with upside down gravity) (No theme)
Nature's Heart, Eden's Altar, Cocoon, Álfheimr (Theme: Meh, three of them were already done. Alfheimr is the land of elves according to Norse Mythology, which I always thought went with life because of Yggdrasil, Still, "Nature's Heart" is lame. If I could change that to Yggdrasil it'd kick ass.)
Solarus, Kingdom of Seraphs, Illuminatis, Prismia (theme: literal light)
Mirage, Shifting Sands, Traveler's salvation (an oasis), Still Dune (theme: desert)
Aquarius, Poseidon's Gate, Azure Deep, the Cetus River Delta (theme: Graeco-roman gods)
Other: Outlaw City, Omniton, Rebel Outpost