Family name Synthia-Theocilia (Synthia-Theocilia 
) , throughout the world, is an extremely rare last name. Much more prevalently, Synthia-Theocilia is the forename as well as the last name. Parts of the name also exists independently as a first name Synthia.
| VARIANT | COUNTRY |
|---|---|
| Synthia-Theocilia | Democratic Republic of the Congo |