Where did Hackman's name, Kibby Womack, come from?

When I watched "Lucky Lady" something like 30 years ago, I was hit by the name of the leading character -- Kibby Womack, played by Gene Hackman. That probably means very little in California, but in northeastern Kentucky, those are two Greenup County family names that I doubt exist side-by-side anywhere else in the U.S. (I could be wrong.)
I've tried a few times to find out how the names came to be put together but without luck.
The only way I know the two names might have been carried west together is that Roy Rogers (Leonard Slye), who came from Duck Run, Ohio, just across the river from Greenup County, had grandparents by both the names.
If anyone knows, please tell me. It's a simple matter of curiosity for me.

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