- O'Donoghue
- O'Dwyer
- O'Hara
- O'Hart
-
Sarah J. (Nov 1870 - 1951)
- Oaks
- Oard
- Oat
-
William (14 May 1826 - 20 Apr 1898)
- Oberfeldt
-
Elizabeth (1715 - 24 May 1757)
- Oberheim
- Oberholtz
- Oberholtzer
-
Angelino (c 1887 - )Charles (c 1884 - )Gertrude (c 1881 - )James (28 Apr 1904 - Jun 1979)Joseph Hunsberger (10 Jul 1832 - )Lincoln Cassel (11 Jun 1864 - 17 Jul 1948)Marjorie Wilson (17 Jun 1900 - 15 Jan 1993)Sylvester Cassel (11 May 1866 - )William Cassel (1872 - )
- Oberling
- Ochsher
- Odell
- Odenwelder
- Odom
- Oehrli
-
Jo (12 Jul 1906 - 24 Feb 2006)Josephine Carrie (12 Jul 1906 - 24 Feb 2006)
- Oeler
- Oesterling
-
Mable Clare (1 Oct 1899 - 3 Jul 1991)
- Offield
-
Edna Lucille (8 Mar 1917 - )Elsie Elizabeth (1 Mar 1914 - )Joseph Elmer (16 Sep 1877 - 28 Jan 1957)Joseph Wesley (13 May 1919 - )
- Offutt
- Ogden
-
Armstrong (10 May 1795 - 18 May 1876)Bond F. (Oct 1886 - )Frank K. (Apr 1889 - )Garnet Elva (Jan 1884 - 15 Apr 1979)Harold S. (19 Oct 1895 - Jul 1971)James Updegraff (1834 - 1918)John Andrew (1863 - 15 Dec 1899)
- Ogg
-
Lela G. (27 Apr 1892 - May 1985)
- Ogle
- Ogren
- Ohnmeiss
-
Elsie (3 Nov 1932 - 24 Jan 2004)
- Oldaker
- Olden
-
Joseph (1740 - 1821)
- Olen
-
John (1765 - 1831)John (bt 1790 - 1800 - b 1892)Margaret A. (16 Sep 1852 - 1929)Margarett Marshall (16 Sep 1852 - 1929)Robert H. (29 May 1828 - 17 Jan 1905)
- Olin
-
John (1664 - 1742)Joseph (28 Aug 1710 - 30 Oct 1760)
- Oliphant
- Olive
-
Robert G. (18 Jun 1922 - 28 Apr 1980)
- Oliver
-
Rebecca Melissa (4 Oct 1857 - 1926)Richard (1831 - )
- Olivorie
- Olmstead
-
Mary Louise (5 Aug 1907 - 19 Dec 2006)
- Olney
- Olsen
- Olson
-
Mary Kathryn (1930 - 1998)Ruth Joan (21 Aug 1935 - 1 May 1938)Verner Israel (18 Mar 1902 - 5 Apr 1977)
- Op Den Graeff
-
Abraham (15 Jul 1610 - 17 Mar 1656)Abraham (9 Sep 1685 - 11 May 1689)Abraham (c 1716 - )Abraham (c 1753 - )Abraham (c 1807 - )Abraham (c 1816 - )Abraham Isaacs (1651 - 25 Mar 1731)Adolphus (1648 - )Agnes (1 Sep 1614 - 20 Aug 1691)Alletjin (1619 - 1619)Alletjin (c 1624 - )Andreas (1625 - )Andreas (1631 - )Ann (c 1747 - )Ann (c 1780 - )Anna Magdalena (9 Mar 1759 - )Anne (c 1741 - )Anneken (1693 - )Annie (1693 - )Barrinda (c 1737 - )Berinda (c 1810 - )Catherine (c 1715 - )Catherine (c 1841 - )Charles (1825 - 1879)Conrad (27 Nov 1771 - bt Apr 1863 - 1865)Derick Isacks (1640 - May 1697)Dinken (18 Aug 1607 - 21 Jun 1608)Dirck Isacks (1640 - May 1697)Dirk (Oct 1621 - 14 Apr 1655)Dorothy (c 1906 - )
- Op Den Graeff (cont.)
-
Edith M. (29 Jan 1898 - Mar 1985)Edward (1720 - )Edward (1746 - )Edward (27 Nov 1771 - 1850)Edward (c 1774 - 1801)Edward (1800 - )Edward (c 1841 - )Edward (c 1848 - )Edward (c 1848 - )Edward Isaac (27 Nov 1771 - 1850)Elizabeth (c 1713 - )Elizabeth (c 1757 - )Elizabeth (c 1782 - )Elizabeth (c 1819 - )Elizabeth Garner (c 1826 - )Ellinore (c 1786 - )Enneken (c 1725 - )Eva (1681 - )Floyd E. (c 1900 - )Frances (10 Sep 1756 - )Frederick (1702 - )Frinken (1 Apr 1628 - )Fronica (10 Sep 1756 - )George (c 1834 - )Gertien (1683 - 1770)Hallerken (1 Sep 1614 - 20 Aug 1691)Hannah (c 1739 - )Henry (c 1748 - )Henry (c 1784 - )Henry (c 1838 - )
- Op Den Graeff (cont.)
-
Herman (26 Nov 1585 - 27 Dec 1642)Herman (17 Dec 1647 - 17 Jan 1695)Herman Isacks (1642 - 1708)Hester (5 Mar 1609 - 11 Dec 1657)Isaac (1693 - 1747)Isaac Conrad (27 Nov 1771 - bt Apr 1863 - 1865)Isaac Hermans (28 Dec 1615 - 16 Jan 1679)Jacob (17 Jul 1617 - Dec 1618)Jacob (1634 - 1634)Jacob (1687 - 1750)Jacob (1745 - 1812)Jesse (c 1777 - )Jesse (1813 - )John Adam (1761 - )John William (24 Apr 1732 - bt 1800 - 1804)Joseph (c 1744 - )Joseph (c 1750 - )Joseph (1788 - 1863)Joseph (1821 - 1897)Josephine (c 1843 - )Levi (c 1828 - )