Daniel, after reading your message again I realize I didn't fully respond to your query. As to the origins of the Dugger's I think that most Dugger researchers trace our American heritage to Daniel Dugger, b. c1690, probably in VA and his wife, Mary Scarborough. Daniel lived his life first in Surry Co., VA and then Brunswick Co., VA. Many of his descendants spread out from there with the first migrations mainly to North Carolina, Kentucky, Tennesse and points west. Others went on south to South Carolina, Georgia, Florida, Alabama and Mississippi. There were a lot of Dugger's in North Carolina (and still are). By the way, the name Lawson is common in some of the Dugger lines that I have seen. There are some websites that have a lot of good Dugger information. For example, Marty Grant, a Dugger descendant, has posted a lot of excellent information on the WeRelate.org website.
If you would like more specific information let me know.