I'm not kin to the whole Gribble clan in Warren Co., TN, but to a lot of them. I had not looked far enough into George Gribble's uncles, but sure enough he had an uncle Jeremiah Gribble. The George in Warren Co., TN was son of a John Thomas Gribble.
There are too many coincidences here including the right birth year for George in AR, as well as born in TN. His father, John Thomas Gribble stayed in Warren Co., TN.
It would be well worth risking the cost of a death cert. Thanks for the guidance.