In the world, Math-Fidèle-Mercia (Math-Fidèle-Mercia 
) is a rare feminine forename. The first name Math-Fidèle-Mercia is habitual in Sub-Saharan Africa, particularly the Democratic Republic of the Congo, where it is a rare feminine name. Parts of the name also exists independently as a first name Math, a first name Fidèle, and a first name Mercia.
| VARIANT | COUNTRY |
|---|---|
| Math-Fidèle-Mercia | Democratic Republic of the Congo |