People from X = "X-ians"?
Now it just makes me think of repeat Godzilla antagonists Planet X: https://cdn.nostrcheck.me/af92154b4fd002924031386f71333b0afd9741a076f5c738bc2603a5b59d671f/fab65d82c677663225713f21324f887f6285ed67cd3c9de4628a04dff8776416.webp