Nifl(heim), the underworld, a land of frost and mist. The other machine in this house is called Muspell, which is the opposite, the land of fire. Both are the primordial worlds in Norse mythology which existed before time and creation.
I always use mythological names for my systems. One reason for that is that there's plenty of exotic names to choose from that way. All my drives/partitions are named after dragons, demons and other monsters from myth and legend.