| Last Name | Given Name / Maiden Name | Birth | Death | Notes |
| Oakley | Carol Jean Petersen | 23 Oct 1933 | 6 Apr 2015 | d/o Henry Soren Peter & Clara Victoria Rasmussen Petersen |
| Oakley | Clara Victoria Rasmussen | 18 Mar 1907 | 3 Apr 1994 | married Henry Soren Peter Peterrsen 11 Jul 1928, p/o Carol, Rosalie, Doris; 2nd marriage to George Dewey Oakley |
| Oakley | George Dewey | 15 Nov 1898 | 17 Aug 1956 | married Nellie Lucinda Howley, p/o Dorothy, George, Norma, Lloyd, James, Howard, Allen; married Clara Victoria Rasmussen Petersen 15 May 1946, p/o Patricia, Lois, Elizabeth |
| Ochsner | Edgar John | 27 Apr 1906 | 27 Dec 1973 | married Beth Fuller, p/o Beverly & Sharon; 2nd wife, Helen J. Ochsner |
| Ochsner | Helen J. | 29 Sep 1911 | 26 Oct 1977 | s/s Edgar John Ochsner, married 1 Oct 1940 |
| Ohde | Anna C. | 1872 | Aug 1879 | d/o Jurgen George & Anna Marie Everhart Ohde |
| Ohde | Anna Marie Everhart | 5 Jan 1849 | 15 Jan 1925 | w/o Jurgen George Ohde, Sr. |
| Ohde | Anna R. Georgius | 2 Aug 1881 | 19 May 1961 | s/s George Jacob Ohde |
| Ohde | Anna Rademann | 1881 | 1961 | w/o George Ohde |
| Ohde | Bernice Margaret Dethlefs | 2 Dec 1916 | 11 Oct 2009 | s/s William Franklin Ohde |
| Ohde | Frances Brunnier | 7 Jun 1889 | 23 Mar 1981 | s/s WilliamOhde |
| Ohde | George | 13 Jan 1878 | 31 May 1929 | married Anna Rademann 18 Sep 1901, p/o Leona and a son who died in infancy |
| Ohde | George Jacob | 28 Jun 1879 | 6 Jan 1968 | married Anna R. Georgius 28 Jan 1903, p/o Melvin, Wesley, Lester, Raymond, Jean, Viola, Oliver, Oscar and a son who died in infancy |
| Ohde | Infant Son | 7 Mar 1903 | 10 Mar 1903 | s/o George & Anna Rademann Ohde |
| Ohde | Jacob, Jr. | 27 May 1875 | 24 Oct 1932 | married Nina Mutum 23 Sep 1910, p/o Clarence |
| Ohde | Jurgen George, Sr. | 30 Jan 1846 | 25 Oct 1919 | married Anna Marie Everhart 28 Oct 1869, p/o Anna, Lena, William, Henry, George, Jacob, Emma, Mary |
| Ohde | Lena | 1870 | 1890 | d/o Jurgen George & Anna Marie Everhart Ohde |
| Ohde | Margaret Mae Gruhn | 26 Sep 1915 | 31 Aug 1989 | w/o Raymond Dennis Ohde |
| Ohde | Oscar | 3 Sep 1907 | 12 Nov 1907 | s/o George Jacob & Anna R. Georgius Ohde |
| Ohde | Raymond Dennis | 9 Nov 1908 | 22 Mar 1998 | married Margaret Mae Gruhn 3 Jan 1936, p/o Roger & Sally |
| Ohde | Ruth Anne | 4 Jan 1941 | 27 Sep 2017 | m/o Ron & Allison; d/o William Franklin "Bill" & Bernice Margaret Dethlefs Ohde |
| Ohde | Sally Ann | 14 Apr 1942 | 14 Apr 1942 | d/o Raymond Dennis & Margaret Mae Gruhn Ohde |
| Ohde | William | 1 Sep 1885 | 16 Aug 1969 | married Frances Brunnier 18 Jun 1907, p/o William |
| Ohde | William Franklin "Bill" | 21 Mar 1916 | 24 Oct 2010 | married Bernice Margaret Dethlefs 26 Feb 1939, p/o Linda, William, Ruth, John |
| Ohl | Edward Alex | 17 Nov 1977 | 18 Mar 2013 | s/o Edward Ernest "Ed" & JoAnn Peters Ohl |
| Ohl | Edward Ernest "Ed" | 5 Jun 1943 | 4 Feb 2015 | married JoAnn Peters in Jun 1969, p/o Edward & Erika |
| Ohm | Betty Elsbe Reimers | 6 Nov 1888 | 9 Dec 1978 | s/s Harry Jenning Ohm |
| Ohm | Harry Jenning | 19 Sep 1879 | 15 Mar 1959 | married Betty Elsbe Reimers 24 Jun 1913, p/o Richard & Dolores |
| Ohm | Richard Reimer | 27 Feb 1922 | 5 Jan 1962 | h/o Mary Jane Ohm, p/o Michael & Michele |
| Ohrt | George | 1901 | 1902 | s/o John H. & Julius John Ohrt |
| Ohrt | John H. | 21 Apr 1865 | 4 Dec 1938 | married Katherine "Katie" Frahm 10 Oct 1895, p/o George, Mildred, Julius, Hulda, Lillian |
| Ohrt | Julius John | 22 May 1900 | 17 Apr 1947 | married Nellie Marie Mohr 20 Dec 1922, p/o Marian & Shirley |
| Ohrt | Katherine "Katie" Frahm | 4 Apr 1875 | 6 Dec 1959 | s/s John H. Ohrt |
| Ohrt | Nellie Marie Mohr | 2 Dec 1903 | 12 Mar 1994 | w/o Julius John Ohrt |
| Olsen | Audrey La Rene Cramer | 26 Sep 1926 | 17 Oct 2011 | s/s LaVerne Newton Olsen |
| Olsen | LaVerne Newton | 4 Feb 1921 | 17 Nov 2005 | married Audrey La Rene Cramer 29 Sep 1944, p/o Steven & Kathy |
| Olsen | Steven L. | 8 Nov 1952 | 7 Jan 1976 | s/o LaVerne Newton & Audrey La Rene Cramer Olsen |
| Olson | Rhonda Eileen Malloy | 14 Nov 1962 | 3 Jun 2022 | w/o Kim Olson, p/o Chassity & Allison |
| Opperman | Anna Marie Rathjens | 21 Nov 1871 | 27 Sep 1927 | w/o John Opperman |
| Opperman | David Emil "Mr. B" | 10 Oct 1958 | 13 Nov 2016 | married Cynthia Curlile 10 Oct 2010, f/o Erica |
| Opperman | Donald Charles | 10 Oct 1958 | 26 Oct 2021 | triplet, s/s David Emil & Douglas Lynk Opperman, adopted by George W. & May Thomas Opperman |
| Opperman | Douglas Lynk | 10 Oct 1958 | 13 Apr 1991 | s/o George W. & May Thomas Opperman |
| Opperman | Elizabeth Jeanne "Betty" Harding | 24 Apr 1928 | 28 Dec 2015 | married Ivan Leon Opperman 24 Mar 1951, p/o Susann, John, James, Emily, Valarie, Rhonda |
| Opperman | Emil John | 21 Jun 1895 | 20 Nov 1977 | married Mabel Dietz 23 Dec 1919, p/o George, Ivan, William, Jane |
| Opperman | George W. | 23 Aug 1922 | 20 Jun 2015 | married May Thomas 17 Jun 1944, p/o Mary, Tom, Mike and triplets David, Donald, Douglas |
| Opperman | Herman | 24 Oct 1887 | 17 Nov 1969 | s/o John D. & Magdalina Hansen Opperman |
| Opperman | Johannah "Hannah" | 16 Aug 1895 | 14 Feb 1913 | d/o John & Anna Marie Rathjens Opperman |
| Opperman | John | 10 Jul 1864 | 31 May 1944 | married Anna Marie Rathjens 14 Feb 1890, p/o Anna, Bertha, Harry, Johannah, Hilda, Gilbert, Roscoe, Minnie, Raymond |
| Opperman | Lavanna Marie Rohde | 14 Jul 1919 | Jan 1978 | s/s Raymond Oppermann |
| Opperman | Mabel Dietz | 26 Sep 1896 | 18 May 1981 | s/s Emil John Opperman |
| Opperman | Magdalena "Maggie" Karsten | 21 Aug 1868 | 2 Jan 1953 | s/s William Opperman |
| Opperman | Minna Maria | 30 May 1902 | 7 Sep 1904 | d/o John & Anna Marie Rathjens Opperman |
| Opperman | Raymond | 14 Jan 1913 | 13 Jan 1985 | married Lavanna Marie Rohde in 1949 |
| Opperman | Roscoe H. | 27 Dec 1909 | 28 Dec 1910 | s/o John & Anna Marie Rathjens Opperman |
| Opperman | Rudolph | 30 Apr 1898 | 23 Jun 1983 | William & Magdalena "Maggie" Karsten Opperman |
| Opperman | William | 28 Jul 1867 | 2 Feb 1951 | married Magdalena "Maggie" Karsten 30 May 1891, p/o Emil, Lena, Mamie, Rudolph |
| Oppermann | Claus Friedrich | 11 Dec 1833 | 23 Aug 1921 | married Magreta Margaret Greue 3 Nov 1867, p/o Johann, Anna, Bertha, Wilhelm, Albert, Hattie, Mina |
| Oppermann | Henry H. | 1873 | 3 Oct 1933 | married Martha Klindt (listed under Ploen) 29 Mar 1900 |
| Oppermann | John D. | 18 Mar 1875 | 16 Apr 1906 | married Magdalina "Lena" Hansen, p/o John, Hattie, Tracy, Herman, William, Anna, Henry |
| Oppermann | John | 28 Nov 1877 | 7 Apr 1949 | married Martha Studeman in 1910 |
| Oppermann | Magdalina "Lena" Hansen | Jun 1846 | 12 Jan 1926 | w/o John D. Opperman |
| Oppermann | Magreta "Margaret" Greue | 16 Jan 1842 | 17 Mar 1904 | w/o Claus Friedrich Oppermann |
| Oppermann | Martha Studeman | 28 Oct 1885 | 21 Jan 1938 | s/s John Oppermann |
| Ostebee | Magnus Cyril | 20 Sep 1816 | 15 Feb 1966 | married Viola Mae Asmus 20 Aug 1944, p/o Eugene, Merlene, Eileen |
| Ostebee | Viola Mae Asmus | 6 Apr 1925 | 30 Jan 2018 | s/s Magnus Cyril Ostebee |
| Otto | Bennie George | 28 Sep 1918 | 15 Dec 1999 | married Geniece Hertha Jahn 20 Aug 1950, p/o Beverly |
| Otto | Carl Reinhold | 5 Sep 1882 | 30 Jan 1953 | married Catharina Wilhelmina "Tena" Hass 22 Jan 1913, p/o William, Henry, Louie, Bennie, Elmer, Malinda, Milda |
| Otto | Catharina Wilhelmina "Tena" Hass | 3 Jan 1886 | 2 Oct 1969 | s/s Carl Reinhold Otto |
| Otto | Dalores Marie Hagedorn | 18 Sep 1919 | 5 Jan 2015 | s/s Louie Julius Otto |
| Otto | Elmer Charley | 23 Sep 1920 | 2 Feb 1999 | married Myrtle Louise Hagedorn 17 Mar 1943, p/o Joyce & Duane |
| Otto | Geniece Hertha Jahn | 28 May 1927 | 21 Feb 2012 | s/s Bennie George Otto |
| Otto | Henry Carl "Heinie" | 25 Jan 1914 | 8 Aug 1987 | married Viola Christy Stuhr 15 Jun 1935, p/o Merlin & Marlene |
| Otto | Irene Dorothy Jahn | 24 Sep 1920 | 21 Oct 2004 | s/s William August Otto |
| Otto | Louie Julius | 20 Jan 1917 | 26 Feb 2004 | married Dalores Marie Hagedorn 22 Mar 1950 |
| Otto | Myrtle Louise Hagedorn | 26 Apr 1922 | 4 Feb 2016 | s/s Elmer Charley Otto |
| Otto | Viola Christy "Tootie" Stuhr | 7 Sep 1912 | 31 Mar 1991 | s/s Henry Carl "Heinie" Otto |
| Otto | William August | 21 Aug 1915 | 11 Dec 1994 | married Irene Dorothy Jahn 5 Jun 1945, p/o Arlene & Allan |
