| Father | Roman Siwak (1890 - 1990) |
| Mother | Karoline Gwozdz (1891 - 1936) |
| Sibling | Teresa Siwak (1923 - 2008) |
| Sibling | Sr. Blanche Siwak OSB ( - 1998) |
| Sibling | Elsa Siwak ( - 2004) |
| Sibling | Leo Siwak ( - 2003) |
| Sibling | Eugenia Siwak (1911 - 2005) |
| Sibling | Casimir Siwak (1914 - 2000) |
| Sibling | Sr. Mary Caroline Siwak OSB (1916 - 2006) |
| Sibling | Roman Paul Siwak (1921 - 2007) |
| Sibling | Caroline Siwak (1918 - 1918) |
| Sibling | Stanley Siwak (1922 - 1922) |
| Sibling | Anthony Siwak (1925 - 1946) |
| Sibling | Irene Mary Siwak (1926 - 1926) |
| Sibling | Ted Siwak (1927 - 1999) |
| Sibling | Irene C. Siwak (1929 - 1992) |
| Sibling | Andzia Siwak (1932 - 2004) |
| Sibling | Baby Siwak (1932 - 1932) |