Cognomen Диофант (Diofanto 
, Diophantus 
, Диофант 
) , in the world, is a very rare family name. The surname Диофант is characteristic of Peru, where it is a very rare surname, Spain, and Colombia. More prevalently, Диофант is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Diofanto | Brazil, Spain, Colombia, Mexico, Peru |
| Diophantus | Philippines, United States |
| Диофант | Russia |
Diofantos, and Diophantos