Family name Marsiu (Marsiu 
) , in the entire world, is an extremely rare cognomen. The last name Marsiu is characteristic of Nicaragua, where it is a very rare surname, Honduras, and India, where it is an extremely rare surname. Likewise, Marsiu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Marsiu | India, Honduras, Nicaragua, Brazil |