Family name Gregoriu (Gregoriu 
) , in the world, is a very rare cognomen. The family name Gregoriu is habitual in Romania, where it is a rare surname, Canada, where it is an extremely rare surname, and Brazil. Much less frequently, Gregoriu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gregoriu | Brazil, Canada, Philippines, India, Romania |
| gregoriu papp RO (b. 1850) |
|