Cognomen Ridderberg (Ridderberg 
) , across the world, is a very rare surname. The last name Ridderberg is habitual in Northern Europe, particularly Denmark, where it is a rare surname, and Sweden.
| VARIANT | COUNTRY |
|---|---|
| Ridderberg | Sweden, Denmark |
| harald ridderberg SE (b. 1632) |
|
|
| christina ridderberg SE |
|