Cognomen سيدلر (Seidler 
, Siedler 
, سيدلر 
) , in the entire world, is a common family name. The surname سيدلر is habitual in Germany, where it is quite a common surname, Austria, and Czechia, where it is quite a rare surname. Measured by absolute frequency, this name is the most popular in Germany, the United States, and Brazil. Very seldom, سيدلر is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Seidler | Austria, Germany, Brazil, Czechia, United States |
| Siedler | Austria, Germany, Brazil, Poland, United States |
| سيدلر | Iran |