Cognomen Eider (Eider 
, Ejder 
, Aid 
) , throughout the world, is a common family name. The family name Eider is characteristic of Algeria, where it is quite a rare surname, Egypt, and Turkey. Also, Eider is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Eider | Germany, Spain, Malaysia, Colombia, Brazil |
| Ejder | Turkey, Azerbaijan, Germany, Saudi Arabia, France |
| Aid | Turkey, Saudi Arabia, Algeria, Egypt, Spain |
| เหมือนกัน | Thailand |
| shimon eider American rabbi (1938-2007) (b. 1938) |
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| max eider British guitarist, GB |
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| dieine eider BR |
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