| Mary Gwendolin Caldwell | |
| Marquise des Monstiers-Mérinville | |
| More: | no |
| Spouse-Type: | Spouse |
| Father: | William S. Caldwell |
| Birth Name: | Mary Gwendolin Byrd Caldwell |
| Birth Date: | October 21, 1863 |
| Birth Place: | Louisville, Kentucky, U.S. |
| Death Date: | August 5, 1909 (aged 45) |
| Death Place: | New York Harbor, New York, U.S. |
| Burial Place: | Cave Hill Cemetery |
| Website: | |module=} |