Cognomen Demanna (Demanna 
) , in the world, is a rare last name. The cognomen Demanna is habitual in India, where it is a very rare surname, Italy, where it is an extremely rare surname, and the United States. Likewise, Demanna is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Demanna | United States, India, Italy |