| Name | Relationship with Natalie Seiwell | Civil | Canon |
| Vanderslice, Henry Cummings | 3rd cousin 5 times removed | XIII | 9 |
| Vanderslice, Isaac | 3rd cousin 5 times removed | XIII | 9 |
| Vanderslice, Isaac | 4th cousin 4 times removed | XIV | 9 |
| Vanderslice, Isaac Vipel | 5th cousin 3 times removed | XV | 9 |
| Vanderslice, Jacob Barge | 3rd cousin 5 times removed | XIII | 9 |
| Vanderslice, Jacob S. | 5th cousin 3 times removed | XV | 9 |
| Vanderslice, Jacob Sassamanhausen | 2nd cousin 6 times removed | XII | 9 |
| Vanderslice, James Barge | 3rd cousin 5 times removed | XIII | 9 |
| Vanderslice, John | 6th cousin twice removed | XVI | 9 |
| Vanderslice, John Barge | 3rd cousin 5 times removed | XIII | 9 |
| Vanderslice, John C. Vipel | 5th cousin 3 times removed | XV | 9 |
| Vanderslice, John Christien | 3rd cousin 5 times removed | XIII | 9 |
| Vanderslice, John Cummings | 3rd cousin 5 times removed | XIII | 9 |
| Vanderslice, John Cunard | 4th cousin 4 times removed | XIV | 9 |
| Vanderslice, John Sassamanhausen | 2nd cousin 6 times removed | XII | 9 |
| Vanderslice, Joseph | 5th cousin 3 times removed | XV | 9 |
| Vanderslice, Joseph Christien | 3rd cousin 5 times removed | XIII | 9 |
| Vanderslice, Joseph Clemmons | 3rd cousin 5 times removed | XIII | 9 |
| Vanderslice, Joseph Vipel | 5th cousin 3 times removed | XV | 9 |
| Vanderslice, Joseph Vipel | 5th cousin 3 times removed | XV | 9 |
| Vanderslice, Kate Seltzer | 4th cousin 4 times removed | XIV | 9 |
| Vanderslice, Kitty Barge | 3rd cousin 5 times removed | XIII | 9 |
| Vanderslice, Lafayette | 6th cousin twice removed | XVI | 9 |
| Vanderslice, Maria Christien | 3rd cousin 5 times removed | XIII | 9 |
| Vanderslice, Maria Cummings | 3rd cousin 5 times removed | XIII | 9 |
| Vanderslice, Mary A. | 6th cousin twice removed | XVI | 9 |
| Vanderslice, Mary A. Seltzer | 4th cousin 4 times removed | XIV | 9 |
| Vanderslice, Mary Barge | 3rd cousin 5 times removed | XIII | 9 |
| Vanderslice, Mary Elizabeth Vipel | 5th cousin 3 times removed | XV | 9 |
| Vanderslice, Mary M. | 5th cousin 3 times removed | XV | 9 |
| Vanderslice, Rebecca | 4th cousin 4 times removed | XIV | 9 |
| Vanderslice, Samuel | 4th cousin 4 times removed | XIV | 9 |
| Vanderslice, Samuel Hansbury | 5th cousin 3 times removed | XV | 9 |
| Vanderslice, Sarah Christien | 3rd cousin 5 times removed | XIII | 9 |
| Vanderslice, Sarah Thompson | 3rd cousin 5 times removed | XIII | 9 |
| Vanderslice, Susannah Barge | 3rd cousin 5 times removed | XIII | 9 |
| Vanderslice, Thomas | 4th cousin 4 times removed | XIV | 9 |
| Vanderslice, Thomas Christien | 3rd cousin 5 times removed | XIII | 9 |
| Vanderslice, William Christien | 3rd cousin 5 times removed | XIII | 9 |
| Vanderslice, William Height | 4th cousin 4 times removed | XIV | 9 |
| Vanderslice, William Henry Vipel | 5th cousin 3 times removed | XV | 9 |
| Vanderslice, Willie | 6th cousin twice removed | XVI | 9 |
| Vandersluice, Ann Thompson | 3rd cousin 5 times removed | XIII | 9 |
| Vandersluice, Benjamin Thompson | 3rd cousin 5 times removed | XIII | 9 |
| Vandersluice, Henry Lornison | 4th cousin 4 times removed | XIV | 9 |
| Vandersluice, Henry Sassamanhausen | 2nd cousin 6 times removed | XII | 9 |
| Vandersluice, Henry Thompson | 3rd cousin 5 times removed | XIII | 9 |
| Vandersluice, Jacob Thompson | 3rd cousin 5 times removed | XIII | 9 |
| Vandersluice, Joseph S. Lornison | 4th cousin 4 times removed | XIV | 9 |
| Vandersluice, Mary Thompson | 3rd cousin 5 times removed | XIII | 9 |