Family name Ruddeck (Ruddeck 
) , in the entire world, is a rare surname. The family name Ruddeck is habitual in Germany, where it is a rare surname, South Africa, where it is an extremely rare surname, and France. Measured by absolute frequency, it most frequently occurs in Germany, the United States, and South Africa.
| VARIANT | COUNTRY |
|---|---|
| Ruddeck | United States, Germany, France, South Africa |