Cognomen ريجي (Reggie 
, Ryuji 
, Riggi 
) , all around the world, is quite a common last name. The cognomen ريجي is habitual in Italy, where it is quite a rare surname, Malaysia, and Luxembourg. Not in comparison with a country's population, it is the most numerous in Italy, the United States, and Japan. More frequently, ريجي is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Reggie | Japan, Philippines, Indonesia, United States, Ghana |
| Ryuji | Japan, Philippines, Indonesia, United States, South Africa |
| Riggi | Japan, Philippines, Indonesia, United States, Italy |
| ريجي | Yemen, Iran |