My first computer job was at a college that used names from ancient history and mythology. So I mostly still do that. Medea is my plex server. Zeus and Hera are the hosts for docker and VMs. Heimdall is the router.
The only break in the pattern is my storage, which is currently NASC and NASD...
Oh and my personal machine used to be HAL_9000 (complete with wallpaper and theme sounds) but now I just name it "box."