"rocinante" for my proxmox host.
"awkward, past his prime, and engaged in a task beyond his capacities." From don Quixote's wiki page.
It seemed fitting considering it is a server built from old PC parts..engaged in tasks beyond its abilities.
The rest of my servers (VMs moslty) are named for what they actually do/which vlan they are on (eg vm15) and aren't fun or excitin names. But at least I know if I am on that VM it has access to that vlan(or that it's segregated from my other networks).