Cognomen סדו (Seydoux 
, סדו 
) , around the globe, is quite a rare family name. The family name סדו is habitual in Switzerland, where it is quite a rare surname, France, where it is a rare surname, and the United States, where it is a very rare surname. Very seldom, סדו is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Seydoux | Italy, Switzerland, United Kingdom, United States, France |
| סדו | Israel |