Not a specific brand, but a specific design type, as Tom said it was designed by John Browning (who designed many famous sporting and military arms) as a replacement for the revolvers that the military carried at the time. The 1911A1 (main variant improved over the initial 1911) now is available as custom and standard improved variants as well as basic models true to the military grade, made by a multitude of manufacturers. The list is huge, some names include Kimber, Wilson Combat, Les Baer, Para-Ordnance, Springfield Armory, Colt, Enterprise, Ed Brown, Auto-Ordnance, Caspian Arms, STI and on and on, all offering their interpretations of this singular and reliable design. The most recent large manufacturer to enter the fray is suprisingly Smith and Wesson. During wartime the standard issue 1911's could be made by anyone from General Motors to Ithaca and Remington to Frigidaire. There is also a huge amount of aftermarket parts and accessories for this particular type of firearm.
Hope this helps!
Later,
TSG /ubbthreads/images/graemlins/grin.gif