The funniest part about its US/EU name differences, is that we don't know what their Japanese names are.
While the Japanase version hasn't been released let, the Japanase scrpit, graphics, names etc are in both the US/EU version.
If you have an action replay, you can play the game in Japanase (the title won't change but everything else will be in Japanase).
http://forums.warsworldnews.com/viewtopic.php?f=28&t=9943So the Japanase names are known.
www.advancewarsnet.com has more details but the playable Japanese CO names are (taken from kotarou post):
エド  (Ed)
ブラウン  (Brown)
リン (Ling)
カトレア  (Katorea) 
アトリー  (Atorii)
トラク  (Toraku)  
カーライル  (Kaarairu)  
ディーター  (Deiter)
ジギスムント (Seigismundo)
ãƒãƒ¼ãƒŸã‚£ã€€ (Romi)  
リーゼãƒãƒƒãƒ†ã€€(Riizerotte) 
ã¹ã‚Šã‚¹ (Bellis)