David, The book,Kentucky: A History of the State, Battle,Perrin & Kniffin, 5th ed, 1887 includes the following:"The other three brothers settled in and near Lancaster,Penn , remaining in that place until 1760 , when William (McKee), moved to Augusta County,VA from whence his family moved in 1788 to Kentucky -----"
The same article notes that John McKee was brought to Kentucky in 1790 with his brother Samuel and was settled in Franklin County.
Picked this up from genforum mckee msg #3799 by Jane Martin in Oct 2005. I do not posseess the noted book.
David Wickersham's Genealogy Page on tripod.com lists many McKees in early Ky and two early VA McKees:Robert 09 Sept 1766 of Rockbridge Co VA and Samuel 03 July 1764 of Augusta Co Va.Sadly, I failed to get the meaning of the dates. These two McKees appear to be the same as noted in the above Kentucky history book.