There are 3 servers that run the control system on the Beryl Alpha oil platform called Penny, Dianne and Anne (Penny is one of our engineers, Dianne and Anne were/are admin).
"I just need to take Anne down for half an hour...."
When I started here there was an isolated Unix system whose server was called Bo-Peep and the workstations were Sheep-1, Sheep-2 and so-on. There was also a little VMS setup with servers called Huey, Duey and Louie though I believe those were quite common. Nowadays things like that tend to be unusual as the names are more widely visible.