Have a mascot character, and relate the guild name back to them somehow. For instance, catgirl mage? Flaming Tiger Guild. A literal rabbit, the Dewlap Gang Guild. A guild for me, personally? Ehhhm. That becomes a lil' trickier. I vibe to the concept of Chaos lately, for sure, so something simple like "Pandemonium" would be suitable, but not good enough. Could relate it back to the Greek Myth side of my character and make it the "Primordial Origin" Guild, but that's pretty grand, so if it's a new guild it wouldn't be taken seriously. Haaa~ Perhaps, I should relate it to dungeons since I'm also obsessed with those? AHA! the "Jester Core" Guild! Jesters are quite mad indeed, and "Core" instead of "Corps".