Cognomen Садей (Sadei 
, Sadey 
, Садей 
) , throughout the world, is a rare family name. The last name Садей is characteristic of Cameroon, where it is a rare surname, Egypt, and Ethiopia. Not in comparison with a country's population, it is commonest in India, Egypt, and Ethiopia. Also, Садей is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sadei | Indonesia, Malaysia, United States, India, Pakistan |
| Sadey | Ethiopia, Egypt, Philippines, India, Cameroon |
| Садей | Kazakhstan, Russia, Ukraine |