Family name Sydey (Sydey 
, Сидеы 
) , all over the world, is a very rare last name. The last name Sydey is habitual in Russia, where it is a very rare surname, and Nigeria, where it is an extremely rare surname. Also, Sydey is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sydey | South Africa, Costa Rica, Nigeria, United States, Brazil |
| Сидеы | Russia |