Family name Marcelo Ildefonso (Marcelo Ildefonso 
) , all over the world, is an extremely rare last name. The last name Marcelo Ildefonso is characteristic of Latin America and the Caribbean, particularly Chile, where it is an extremely rare surname. More frequently, Marcelo Ildefonso is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Marcelo Ildefonso | Chile, Ecuador |