Where is it stated he was FROM Alpha Centauri? He is known as Zefram Cochrane OF Alpha Centauri. Just like Lawrence is known as OF Arabia even though he wasn't born there. In my version there was a colony established on Alpha Centauri by sublight ships just prior to WWIII breaking out. Some of the first extra solar space warp flight were to check on this colony. I have Zefram Cochrane moving to Alpha Centauri in 2064 aboard the Bonaventure(C1-21). He went there to establish an second Space Warp Development Facility. That way there would be development both in the solar system and in Alpha Centauri. And FTL Ships traveling to Alpha Centauri wouldn't be stranded if something broke down on their months long voyage. Spending about fifty years in Alpha Centauri caused him to become known as Zefram Cochrane of Alpha Centauri. Plus even being FROM someplace doesn't mean you were born there either. You can be from anywhere you choose to call your home base.