| Father | Oscar Fitzgerald Mosby (1826 - 1888) |
| Mother | Rhoda Hazeltine Dillon (1844 - 1913) |
| Sibling | Judith Henretta Mosby (1865 - 1938) |
| Sibling | Stonewall Jackson Mosby (1867 - 1903) |
| Sibling | Naomi Letitia "Letie" Mosby (1868 - 1919) |
| Sibling | Mary Wilson Mosby (1871 - 1946) |
| Sibling | Jacob Dillon Mosby (1872 - 1951) |
| Sibling | Oscar Fitzgerald Mosby Jt. (1874 - 1955) |
| Sibling | Harriett Hazeltine Mosby (1876 - ) |
| Sibling | Asa Young Mosby (1878 - 1956) |
| Sibling | John Yancey Mosby (1880 - 1947) |
| Sibling | Lillie Lou "Evaline" Mosby (1885 - ) |
| Sibling | Lydia Mosby (1887 - ) |