Wow, thanks for the detail on the counties. I knew a little bit but not that much. I did know that Lenoir was Dobbs and Dobbs was Johnston, - at least parts. I guess there's no definitive answer as settlers came from many directions.
I am personally studying the Nobles from the north and south side of the Trent River near the Noble's Mill.
From what I can find, there was the large and well documented family of Philemon Noble and wife Philpena Miller. Then there apparently is a another family probably related - two George Nobles and a Philemon who lived next to the Philemon/Philpena family.
I think the George line came from Talbot Md.