According to Laura Wagner, in her article on the actor for the Films of the Golden Age, Winter 2013/14 issue, although Ching's surname obviously sounds Asian influenced, he was of prominently English heritage and the name was actually a derivative of the English village of Chingford near London.
I've been told that when I start my radio program people will assume that I am an Oriental, since they can't see me. The fact remains that the performance is what counts; names don't mean anything.