Surname Ruddel (Ruddel 
) , all over the world, is a very rare cognomen. The family name Ruddel is characteristic of Nicaragua, where it is a very rare surname, the United States, where it is an extremely rare surname, and Nigeria. Much more prevalently, Ruddel is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ruddel | Philippines, Nigeria, United States, Democratic Republic of the Congo, Peru |