I am not familiar with your grandparents names, but the name "Favor" is derived from the French name "LeFevre". The LeFevres were an old French Hugenot family who had to leave France because of religious persecution in the 1600's. They first went to England and Holland, then alot of them emigrated to America. Some branches of the family kept the French spelling and some anglicized the name to Favor, Faver, Favour, etc. One branch of the Favors settled in GA, and later AL and TX.