Cognomen Radijs (Radis 
, Radice 
, Radijs 
) , in all the world, is a common family name. The surname Radijs is habitual in Italy, where it is quite a common surname, Paraguay, where it is quite a rare surname, and Argentina. Not in comparison with a country's population, the name is most common in Italy, the United States, and Argentina. Much less frequently, Radijs is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Radis | Brazil, Italy, Indonesia, United States, Argentina |
| Radice | Paraguay, Brazil, Italy, United States, Argentina |
| Radijs | Netherlands |
| Radieschen | Germany |
| christoffel radijs (b. 1699) |
|
|
| nicolaas radijs (b. 1727) |
|
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| henny radijs NL (b. 1915) |
|