| Father | James Frederick Geer Sr. (1824 - 1905) |
| Mother | Mary Bethany Callaway (1825 - 1908) |
| Sibling | Sarah "Sally" Martha Geer (1844 - 1929) |
| Sibling | Mary Helen Geer (1846 - 1892) |
| Sibling | David Paul Geer (1848 - 1895) |
| Sibling | Ann Elizabeth Geer (1850 - 1902) |
| Sibling | Lydia LaBelle Geer (1852 - 1903) |
| Sibling | Ella Caroline Geer (1854 - 1876) |
| Sibling | James Frederick Geer Jr. (1856 - 1890) |
| Sibling | Julie Alline Geer (1858 - 1884) |
| Sibling | Enoch Callaway Geer (1860 - 1926) |
| Sibling | William Brantley Geer (1865 - 1894) |
| Sibling | Alice Angela Geer (1867 - 1930) |