I'm in Denmark, it has been my experience that the most common naming scheme (I would say omnipresent naming scheme almost) is to use the old Norse Pantheon for names.
Different experience in English academia, where I encountered random names (e.g. 'mira' for a shell server and 'laplace' for a Physics Dept server). The acronyms could at times be interesting. Particular favourite was a 'central university network time' server. That was later renamed to ntp.*.ac.uk, after stern recommendations.