Commonwealth Edison was founded by Samuel Insull, who had been Thomas Edison's secretary and a founder of Edison General Electric, which became General Electric, before he came to Chicago to head Commonwealth Edison, which was a merger of Commonwealth Electric and Chicago Edison.
Commonwealth Edison was founded by Samuel Insull. Samuel Insull had been Thomas Edison's secretary. Samuel Insull had been a founder of Edison General Electric. Edison General Electric became General Electric. He came to Chicago. This was to head Commonwealth Edison. Commonwealth Edison was a merger of Commonwealth Electric. Commonwealth Edison was a merger of Chicago Edison.