Alpheus Harlan began to document the Harland family genealogy in 1881.  His book is titled, "The History and Genealogy of the Harlan Family," and this excerpt was obtained from the Harlan Family website:  www.harlanfamily.org/alph.htm.

21. Dinah HARLAN was born on 23 Aug 1707 in Chester County, Pennsylvania. She died on 7 Apr 1763 in London Grove, Chester Co., Pennsylvania. She was buried in Friends Burying Grounds, London Grove, Chester, Pennsylvania. "Born ye 23rd Day of ye 8th mo 1707 about ye 10th hour at night.; d. 4, 7, 1763" She was married to Thomas GREGG (son of John GREGG and Elizabeth COOK(E)) on 20 Feb 1729 in New Garden Meeting House, Chester, Pennsylvania. Thomas GREGG was born in 1701 in New Castle County, Delaware. He died on 1 Sep 1748 in Kennet, Chester, Pennsylvania. "Thomas Gregg inherited from his father 200 acres of land on Red Clay Creek in New Castle County, Delaware, but he chose to settle at Kennett Square, Chester County, Pennsylvania. In the early years of the 1740's he bought extensive acreage in Loudoun County, Virginia, which went at his death to his eldest son Michael but which, by an exchange of deeds, was eventually divided between Michael and his brothers John, Thomas, and Stephen, all of whom settled in Loudoun County." Dinah HARLAN #21 and Thomas GREGG had the following children:

        100     i.      Mary GREGG
        101     ii.     Michael GREGG
        102     iii.    John GREGG
        103     iv.     Thomas GREGG
        104     v.      Lydia GREGG
        105     vi.     Dinah GREGG
        106     vii.    Amy GREGG
        107     viii.   Stephen GREGG.
        108     ix.     Abigail GREGG.