I have a lot of Sandidges in my files and many are from Tennennesse..I need more clues inorder to try to figure out who you are descended from..Where is Merryville? Is it on the East of West side of the mountain. Is it near Memphis or Cleveland..or somewhere else. There are some Sandidges families in Northern Tennessee I know very little about. but I will try to help you...Give me some dates on your grandfathers. William is a pretty common Sandidge name....Dates might help..Do you know what county you grandfather was from? With dates and a county maybe I will be able to help....Jean