Surname גרדוס (Gradus 
, Gardos 
, גרדוס ) , in the world, is quite a rare family name. The family name גרדוס is habitual in Hungary, where it is quite a rare surname, Israel, and Slovakia. Measured by absolute frequency, it is the most numerous in Hungary, Poland, and Tanzania. Also, גרדוס is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gradus | Indonesia, United States, Tanzania, Poland, Israel |
| Gardos | Romania, Hungary, United States, Israel, Slovakia |
| גרדוס | Israel |
| יהודה גרדוס Israeli geographer (1942-2021), IL (b. 1942) |
|