From several sources, ultimately derived from the genealogy holdings of the Ripley Library, the county seat of Jackson County, West Virginia:
There is a Charles Parsons (“Old Charlie Parsons”) who is said by tradition to have been born in Queen Anne County, MD, and who lived much of his life in what is now Jackson County, West Virginia—and is buried there. His father was William Parsons.
This William Parsons was not married to Martha Hughes, nor did he survey Easton. Tradition has it that he emigrated from England to Queen Anne County, Maryland. However, no records of him living in Maryland, or anywhere else, exist—as far as I know. Jackson County tradition says William was the father of Charles. I’ve seen William’s DAR gravestone in Jackson County. I’m not sure he’s actually buried there. The only proof that he existed, that I know of, is a Revolutionary War pension application in which Thomas, the brother of Charles (Old Charlie) Parsons mentions that he and his brothers (including Charlie) came to Jackson County from Queen Anne County, MD—and that their father was named William.
The idea that William came from Prussia was last held in the 1960s, and is presumed to be wrong.
Don Greene’s suggestion that there is an American Indian connection is doubtful, but not disproven.
Charlie Parsons, son of William, my 5th great-grandfather, is well-sourced in Jackson County, WV.