Depends if you want assault faction, strong standing faction,
friendly/family faction, long lasting faction itself, or faction where
people will stay long time themselves, ...
Some examples:
Attila, TheHuns, Genghis, TheSpear, SabreTooth, ...
Fireplace, GlowWorm, Backyard, Junkyard, TheGarage, ...
SkyDiver, Rodeo, Banshee, Succubus, ...
TwinPeaks, MineShaft, RoadHog, Goblin, Blackbeard, ...
7Seas, Thunderbolt, Faering, Karve, Knarr, ...