Not so much servers as removable media. Three letter creature names: ape, bat, cat, dog, elk, fox, gnu, hen, imp, jay, kit, lee (fish), mus, nan (from Inuit folklore), owl, pug, qua, rat, sas (from Slavic folklore) and so on (I need to find my printed list beyond here)
T: "Tay" (a mythical creature from Scottish folklore, often described as a small, elf-like being)
U: "Ufi" (a legendary creature from Native American folklore, said to resemble a small humanoid figure)
V: "Vim" (a mythical creature from Hindu mythology, sometimes depicted as a bird-like being)
W: "Wyy" (inspired by the Wyvern, a legendary creature similar to a dragon but with only two legs)
X: "Xin" (a mythical creature from Chinese mythology, often depicted as a lion-like beast)
Y: "Yen" (a legendary creature from Vietnamese folklore, resembling a large, serpent-like creature)
Z: "Ziz" (a mythical creature from Jewish mythology, described as a giant bird)