Idk, but people who live in Atlanta really like it, so there's obviously something to it.
those other choices tho
Atlanta Fury, Atlanta United FC, ATL United, Atlanta Rising, Atlanta Soccer Club, Atlanta Lynix, Atlanta FC, Resurgens FC, Atlanta Resurgens FC, Atlanta Resurgents, Atlanta Orangemen (a Home Depot reference), Atlanta Football Club, FC Atlanta, Atlanta City Football Club, Terminus FC, Terminus Legion, Atlanta Ringleader FC, Atlanta Old Confederacy, Atlanta Gryphons, Atlanta Osprey, Atlanta Copperheads, Dixie FC, FC Dixie, Atlanta Thunderbirds, Atlanta Athletic FC, Atlanta Swallows, Atlanta Blanks, Atlanta FC Battle, Atlanta Attack, Red Golds, Inter Atlanta, Atlanta Riders, Atlanta Georgians, Atlanta Firecrackers, Atlanta Talons, Atlanta Flight, Atlanta Thunder, Atlanta Warriors, Atlanta Scorz, Ball Kickers, Atlanta Rails, Atlanta Locomotive, Locomotive Atlanta, Georgia Gents, Georgia (or Atlanta) Cannon, Stallions, Atlanta Rage!, and Atlanta Free Birds
This poll is in no way shape or form official btw, it was done by the atlanta business chronicle
There's also the matter of this
http://www.atlantaphoenixfootball.com/