1988, Paul Moore, article in Outdoor Oklahoma, volume 44, page 29:
Not too long ago in the overall scheme of things, Grog the caveman and his fellow hunters were trying hard to bring home the bacon. They weren't having much luck.
2002, Robert C. Elsenpeter, Anthony Velte, Optical Networking: A Beginner's Guide, McGraw Hill Professional (→ISBN), page 38:
At the beginning of this chapter, we had a little fun with the notion of Grog the caveman's “optical network,” which used the light of his fire to tell the […]
2006, Communication Arts
Grog watches as the pterodactyl meets its demise. The stick falls to the ground at Grog's feet. He sighs. Cut to Grog walking into a cave where his boss is sitting on a log. They start growling like cavemen. (Subtitles) Grog: Package didn't make it.
2014, Doug Fields, 7 Ways to Be Her Hero: The One Your Wife Has Been Waiting For, Thomas Nelson (→ISBN), page 13:
Do you really think there could have been a caveman who accidentally discovered sex one day? Can you imagine Grog's hieroglyphic journal entry? Grog run into tree. Ouch! Make face hurt. Then Grog run into Grogette. She soft. I like better.
about a particular comic charater
2006, Brian Walker, The Comics: Since 1945, Harry N Abrams Incorporated
It is made up principally of people who have refused to grow up and who offer their marvelous fantasies to those who wish [...] the inventor , Clumsy Carp the ichthyologist , Grog the proto-caveman, and two females, Fat Broad and Cute Chick .