| Father | Jozef Kazmierz (Joseph Casimir) Szczepankiewicz (1814 - ) |
| Mother | Petronela (Petronilla) Jasniewska (1820 - ) |
| Sibling | Michael Szczepankiewicz (1838 - ) |
| Sibling | Szymon (Simon) Szczepankiewicz (1842 - 1842) |
| Sibling | Ursula Szczepankiewicz (1846 - 1864) |
| Sibling | Marianna Szczepankiewicz (1849 - ) |
| Sibling | Walenty(Valentine) Szczepankiewicz (1852 - ) |
| Sibling | Kazmierz (Casimir) Szczepankiewicz (1855 - ) |
| Sibling | Antonina (Antoinette) Szczepankiewicz (1858 - ) |
| Sibling | Jozef (Joseph) Szczepankiewicz (1861 - ) |
| Sibling | Antoni (Anthony) Szczepankiewicz (1863 - 1931) |