Surname Maniaco (Maniaco 
, Maniacus) , in the world, is a very rare family name. The surname Maniaco is habitual in Italy, where it is a very rare surname, Mexico, where it is an extremely rare surname, and Brazil. Measured by absolute frequency, it is the most numerous in Italy, Mexico, and India. Very seldom, Maniaco is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Maniaco | Mexico, Brazil, Italy, United States, India |