Cognomen ליידר (Leider 
, ליידר 
) , in the world, is quite a rare last name. The family name ליידר is characteristic of Luxembourg, where it is quite a rare surname, Colombia, where it is a rare surname, and Venezuela. Measured by absolute frequency, it most frequently occurs in the United States, Germany, and Colombia. Also, ליידר is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Leider | Peru, Cuba, Colombia, United States, Germany |
| ליידר | Israel |