Cognomen Deonas (Deonas 
) , globally, is a very rare last name. The last name Deonas is characteristic of Greece, where it is a rare surname, Switzerland, where it is a very rare surname, and the United States, where it is an extremely rare surname. In absolute terms, this name is the most popular in Greece, the United States, and Brazil. Much less frequently, Deonas is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Deonas | Philippines, Greece, Brazil, United States, Tanzania |