Surname Marcidus (Marceline 
, Marcid 
, Marcidus 
) , in all the world, is quite a common family name. The family name Marcidus is habitual in Cameroon, where it is quite a common surname, Mauritius, where it is quite a rare surname, and Haiti, where it is a rare surname. In absolute terms, it is the most numerous in Cameroon, Indonesia, and Ivory Coast. More prevalently, Marcidus is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Marceline | France, Cameroon, United States, Democratic Republic of the Congo, Ivory Coast |
| Marcid | Brazil, Chile, United States, Philippines |
| Marcidus | United States, Israel |