John Darcy 
          b. 1737 Prince George Co., Maryland
          d. 1815/1819 Prince George Co., Maryland
          m. 1753 Prince George County Maryland
                Elizabeth King
                b. 1753 Prince George Co., Maryland
                d. 1815/1819 Prince George Co., Maryland
Children:
1.  Joseph Darcey
2.  John Darcey
    m. 21 Nov 1786 Rebecca Hardey
3.  George Darcey
    b. 1778
    m. 27 Dec 1798  Milly Scarce
4.  Ann Darcey 
    b. 1765 Prince George County, Maryland
    d. 1867 Prince George County, Maryland
    m. 21 Nov 1791 Prince George County, Maryland  Nathan Soper
5.  Elizabeth Darcey
    b. 1783 
    m. 21 Nov 1809 John S. Darnall
6.  Lucy Darcey
    m. 1 Jul 1803 Ignatius Lott Hardey
7.  Mary Darcey
    b. 1775
    m. 30 Jan 1793  William Wellin/Welling (?)
8.  Rebecca Darcey
    m. 18 Jan 1803 Joseph Osbourn
9.  Edward Darcey
    b. 1779
    m. 28 Dec 1799  Hannah Peacock/Peach (?)
10. William Darcey
    m. 7 Jan 1804 Ann Hardey
11. Francis Darcey
    b. 1796
    m. 21 Jun 1817 Rebecca Darnall

The dates are not guaranteed accurate. I'm taking them from old notes. 
Any corrected information will be greatly appreciated.