Surname De Oliveira Duarte (De Oliveira Duarte 
) , worldwide, is a very rare family name. The last name De Oliveira Duarte is characteristic of Portugal, where it is a rare surname, France, where it is a very rare surname, and Italy, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| De Oliveira Duarte | Italy, Brazil, Spain, Portugal, France |