| − | John Francis Mercer was born at "Marlboro," Stafford County, Virginia, May 17, 1759, and was graduated from William and Mary College, Virginia, in 1775.<ref>[https://books.google.com/books?id=vgINAAAAYAAJ&pg=PA250 The founders of Anne Arundel and Howard Counties, Maryland: A genealogical and biographical review from wills, deeds and church records]</ref> | + | John Francis Mercer was born at "Marlboro," Stafford County, Virginia, May 17, 1759, to John and Ann Roy Mercer. He graduated from William and Mary College, Virginia, in 1775.<ref>[https://books.google.com/books?id=vgINAAAAYAAJ&pg=PA250 The founders of Anne Arundel and Howard Counties, Maryland: A genealogical and biographical review from wills, deeds and church records]</ref> |