Across the world, Marco Isaias (Marco Isaias 
) is a very rare male first name. The forename Marco Isaias is characteristic of Latin America and the Caribbean, particularly Chile, where it is a rare male name. Very seldom, Marco Isaias is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Marco Isaias | Chile, Peru, Ecuador, Spain, Costa Rica |
Gonzalez, San Martin, Bustos Valladares, Martinez Vargas, and Morales Montero