| Name | Relationship with Wendy Libby | Civil | Canon |
|---|
| Chase, Anna | Wife of the 4th cousin 4 times removed | | |
| Cheney, Teresa Chamberlain | Wife of the 6th cousin 4 times removed | | |
| Chester, Grace F. | Wife of the 5th cousin 3 times removed | | |
| Child | 5th cousin 3 times removed | XV | 9 |
| Church, Belle | Wife of the great-granduncle | | |
| Church, Rachel J. | Wife of the 6th cousin twice removed | | |
| Churchill, Cora | Wife of the 5th cousin 3 times removed | | |
| Cindy | Wife of the 1st cousin once removed | | |
| Clark, Almira Smith | 5th cousin 5 times removed | XVII | 11 |
| Clark, Almon I. | 5th cousin 5 times removed | XVII | 11 |
| Clark, Almond Ingersoll | 5th cousin 5 times removed | XVII | 11 |
| Clark, Anna Jennison | 5th cousin 5 times removed | XVII | 11 |
| Clark, Clarissa | 5th cousin 5 times removed | XVII | 11 |
| Clark, Doris | 10th cousin | XXII | 11 |
| Clark, Erastus | 5th cousin 5 times removed | XVII | 11 |
| Clark, Erastus | 5th cousin 5 times removed | XVII | 11 |
| Clark, Frances A. | Wife of the 3rd cousin 5 times removed | | |
| Clark, Fred | Husband of the 6th cousin 4 times removed | | |
| Clark, Frederick J. | Husband of the 2nd cousin 5 times removed | | |
| Clark, Harriet | 5th cousin 5 times removed | XVII | 11 |
| Clark, Horace | 5th cousin 5 times removed | XVII | 11 |
| Clark, John Leonard | 10th cousin | XXII | 11 |
| Clark, Lucy Jane | 7th cousin 3 times removed | XIX | 11 |
| Clark, Melinda | Wife of the 4th cousin 4 times removed | | |
| Clark, Nancy | Wife of the 3rd cousin 5 times removed | | |
| Clark, Phylenna | 5th cousin 5 times removed | XVII | 11 |
| Clark, Samuel | Husband of the 4th cousin 6 times removed | | |
| Clark, Theodosia | 5th cousin 5 times removed | XVII | 11 |
| Clark, Unknown | Husband of the 9th cousin once removed | | |
| Clement, John | Husband of the 3rd cousin 7 times removed | | |
| Clements, John | Husband of the 1st cousin 8 times removed | | |
| Cleveland, Anna | Wife of the 4th cousin 4 times removed | | |
| Close, Florence | Wife of the 6th cousin twice removed | | |
| Cobb, Chipman | Husband of the 2nd cousin 7 times removed | | |
| Cobb, Edward | 4th cousin 5 times removed | XV | 10 |
| Cobb, Francis | 4th cousin 5 times removed | XV | 10 |
| Cobb, Joshua | 4th cousin 5 times removed | XV | 10 |
| Cobb, Nathan | 3rd cousin 6 times removed | XIV | 10 |
| Cobb, Nathaniel | 4th cousin 5 times removed | XV | 10 |
| Cobb, Samuel | Husband of the 3rd cousin 6 times removed | | |
| Cobb, Samuel | 4th cousin 5 times removed | XV | 10 |
| Cocks, Josiah | Husband of the 2nd cousin 7 times removed | | |
| Cody, James | Husband of the 3rd cousin 7 times removed | | |
| Coe, Sarah | Wife of the 7th great-granduncle | | |
| Coffin, Deborah | Wife of the 1st cousin 9 times removed | | |
| Coffin, George W. | Husband of the 4th cousin 5 times removed | | |
| Coffin, Jason | Husband of the 4th cousin 5 times removed | | |
| Coffin, Mary | Wife of the 4th cousin 5 times removed | | |
| Cohen, Robert | Husband of the 1st cousin once removed | | |
| Collins, Hannah | Wife of the 8th great-granduncle | | |
