So the Psychopaths own no land whatsoever? I guess that's the role of lost wanderers in an apocalypse. As for the unnamed clan, they are bandits. Should they be organized (E.g: The Great Khans from Fallout: New Vegas who reside in Red Rock Canyon) they should have some name that provokes a sense of superiority, domination and, ultimately, mercilessness. Should they be disorganized (E.g: Fiends from Fallout: New Vegas) they should possess a name that strikes fear into their enemies, asserts a powerful but somewhat limited control and should be sporadic: random, usually makes a little reference to the actual history of the clan but not by much.