Searching for information regarding a John Campbell, married to Mary _____.

I have found several land transactions between John Campbell and George Gillispie of Ohio COunty, VA. John purchased 186 acres of land from George in 1801 in New CUmberland, Brooke County, Va. The deed states "I, John Campbell of Washington County, Penna.,. . .". Another version of the deed states "I, John Campbell of Westmoreland County, . . .."

John and Mary had children William, James, Elizabeth, Mary, John W. and L(l)oyd.

Does anyone have any information about this family?

Thanks in advance for your kind attention and assistance.