I have researched for years in the various libraries in the Southern States. I think a large number of Davidsons were in SW Virginia, ETN, & WNC. From there they spread all over the US and back. It is amazing to me how mobile they were. One account said those Davidsons were like Maggots in a fire, they were always moving. My family moved from SWVA to WNCand back to ETN and KY before spreading all over US from Coast to Coast. My immediate family were at one time from NJ to CA and south to FL. I am now in TX and others are in TN and CA still.