| Name | Relationship with Peter Davies | Civil | Canon |
| Dumsday, Arthur | 3rd cousin once removed of the ex-wife | | |
| Dumsday, Arthur | 3rd cousin once removed of the ex-wife | | |
| Dumsday, Arthur | 4th cousin of the ex-wife | | |
| Dumsday, Aubrey | 4th cousin once removed of the ex-wife | | |
| Dumsday, Barbara | 5th cousin once removed of the ex-wife | | |
| Dumsday, Barry Felix | 4th cousin of the ex-wife | | |
| Dumsday, Basil | 5th cousin of the ex-wife | | |
| Dumsday, Beatrice | 4th cousin once removed of the ex-wife | | |
| Dumsday, Benjamin | 3rd cousin twice removed of the ex-wife | | |
| Dumsday, Benjamin | 4th cousin once removed of the ex-wife | | |
| Dumsday, Benjamin William | 5th cousin of the ex-wife | | |
| Dumsday, Bert | 3rd cousin of the ex-wife | | |
| Dumsday, Bertha | 4th cousin of the ex-wife | | |
| Dumsday, Bob | 3rd cousin once removed of the ex-wife | | |
| Dumsday, Brian William | 4th cousin once removed of the ex-wife | | |
| Dumsday, Bryan Harold | 4th cousin once removed of the ex-wife | | |
| Dumsday, Carol Ann | 5th cousin twice removed of the ex-wife | | |
| Dumsday, Carol Joan | 5th cousin once removed of the ex-wife | | |
| Dumsday, Caroline | 1st cousin 3 times removed of the ex-wife | | |
| Dumsday, Caroline | 1st cousin 3 times removed of the ex-wife | | |
| Dumsday, Caroline | 2nd cousin twice removed of the ex-wife | | |
| Dumsday, Caroline | 2nd cousin twice removed of the ex-wife | | |
| Dumsday, Charles | 2nd cousin 3 times removed of the ex-wife | | |
| Dumsday, Charles | 1st cousin twice removed of the ex-wife | | |
| Dumsday, Charles | 1st cousin 4 times removed of the ex-wife | | |
| Dumsday, Charles | 2nd great-grandfather of the ex-wife | | |
| Dumsday, Charles | Great-granduncle of the ex-wife | | |
| Dumsday, Charles | 3rd cousin twice removed of the ex-wife | | |
| Dumsday, Charles | 2nd cousin twice removed of the ex-wife | | |
| Dumsday, Charles | Granduncle of the ex-wife | | |
| Dumsday, Charles | 3rd cousin once removed of the ex-wife | | |
| Dumsday, Charles | 4th cousin once removed of the ex-wife | | |
| Dumsday, Charles Henry | 5th cousin of the ex-wife | | |
| Dumsday, Charlotte | Grandaunt of the ex-wife | | |
| Dumsday, Cheryl Leigh | 5th cousin once removed of the ex-wife | | |
| Dumsday, Cindy-Lou Jean | 5th cousin once removed of the ex-wife | | |
| Dumsday, Clifford Charles | 5th cousin once removed of the ex-wife | | |
| Dumsday, Cyri Robert | Uncle of the ex-wife | | |
| Dumsday, Daniel | 1st cousin 3 times removed of the ex-wife | | |
| Dumsday, Darren Alan | 5th cousin twice removed of the ex-wife | | |
| Dumsday, David | 2nd cousin 3 times removed of the ex-wife | | |
| Dumsday, David | 5th cousin once removed of the ex-wife | | |
| Dumsday, David | 4th cousin once removed of the ex-wife | | |
| Dumsday, David | 4th cousin twice removed of the ex-wife | | |
| Dumsday, Deborah Anne | 5th cousin once removed of the ex-wife | | |
| Dumsday, Derek | 5th cousin once removed of the ex-wife | | |
| Dumsday, Dolly | 3rd cousin once removed of the ex-wife | | |
| Dumsday, Doris | 4th cousin of the ex-wife | | |
| Dumsday, Dorothy Charlotte | Mother of the ex-wife | | |
| Dumsday, Douglas | 4th cousin of the ex-wife | | |