As I stumbled on my client's server, I could notice it was named after Mercury, and that there was a Hermes, a Vulcan and other mythology gods nearby. Besides that it is the quadrillionth time I log on a server named "mercury", I kept wonder how many naming schemes I met during my various business trips. So far, after ten year of consulting, I can count:

• mythology gods
• sci-fi authors
• cities, countries, lakes
• fishes, shells, flowers, sweets
• drugs (yes, I once ssh'd to tetrahydrocannabinol)
• chemical elements
• fiction characters, like Asterix, LOTR, X-Men (good guys being Debian servers, magneto being the Windows server)
• female first names
• boring names like mailgw012

I wonder what else people use, if people know other naming schemes I'd be curious to hear them.