Family name Sydeney (Sydeney 
) , in the entire world, is an extremely rare last name. The last name Sydeney is characteristic of Nigeria, where it is an extremely rare surname, and the United States. More prevalently, Sydeney is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sydeney | South Africa, Brazil, Nigeria, United States, India |