Surname Мадёр (Mader 
, Мадёр 
, Madyer 
) , worldwide, is a common last name. The surname Мадёр is habitual in Western Europe, particularly Switzerland, where it is quite a common surname, Austria, and Germany. Measured by absolute frequency, this name is the most popular in Germany, the United States, and Austria. Much less frequently, Мадёр is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Mader | Germany, Austria, Switzerland, United States, France |
| Мадёр | Kyrgyzstan, Russia |
| Madyer | Nicaragua, Morocco, Brazil, Mexico, Peru |
| Madyor | Venezuela |