I used to work in the GRASP lab at Penn, and my predecessor there was John Bradley of xv fame. He had started naming all the machines after fish.
When I got there I continued the practice, naming some tiny computers being used for mini robots after different types of goldfish.
In my current job, years ago, I managed a group of Linux servers, and I named them after Demons (Lucifer, Asmodeus, Azrael, Beelzebub, etc.).
At this point, there is a specific naming convention in use where I’m at, and the name is limited to identifying organization, application, and server type.