I have a George W. Mahaney, born 12 Feb 1884 in probably Franklin Co., MO.He died in OK 20 Feb 1950.His wife was Mary Ann and they had children that included Marion, John, Noble, and Cecil.There were other children, but I can't remember the names at this moment.His family was in Cherokee Co., OK by about 1900. Does this sound like a possiblity for your George?
I would say that this is your grandfather except that I have his middle name as William and not Washington. Of course, I don't have documentation for the middle name.Everywhere that I find him, he is listed simply as George W.
If you think this might be your man, please contact me directly.KRai3@aol.com