I am a native Virginian and have access to a lot of information on people who settled here and then went west. My husband's German ancestors settled in what is now Shenandoah Co., VA (but was then Orange Co.) in 1744. My own family were settlers in the Northern Neck of Virginia in the 1600s. In 1749 when William Wyatt was imported to Virginia, Orange County extended to the Mississippi River and to the Great Lakes, and included much of the Blue Ridge Mountains through which the Shenandoah valley passes. If you want to order more information, see the following publications. Your nearest large library with a genealogy department can order them for you through interlibrary loan (either in print or on film).
HUDGINS, DENIS. Cavaliers and Pioneers: Abstracts of Virginia Land Patents and Grants, Vol. 5, 1741-1749. Richmond [VA]: Virginia Genealogical Society, 1994. p. 358
Virginia Genealogical Society Quarterly, Volume 30, #2, p. 79. On 05 Sep 1749, John Mallary[sic] received 190 acres of land in Orange County for the importation of 6 individuals from England: William Wyatt, John Adam Corn, John Colthard, Thomas Dickson, George Holden, Samuel Pennell.
The marriage of William Wyatt to Dorothy McInturff is in the Shenandoah marriage records. They do not state that he is from England, but if you trace the migration pattern of him and his McInturff in-laws you will know that it is the same man.
Tracing further back to England could possibly be done since you know his place of birth was Foreham, Hampshire, England. I don't have access to records from there though so you would need to get them through your library or a Family History Center.