Last name Сінді (Sindi 
, Cyndi 
, Sindija 
) , around the world, is a common cognomen. The cognomen Сінді is characteristic of Saudi Arabia, where it is quite a common surname, Honduras, and Iraq. Not in comparison with a country's population, it is commonest in Saudi Arabia, Iraq, and Indonesia. Likewise, Сінді is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sindi | Saudi Arabia, Iraq, South Africa, United States, Indonesia |
| Cyndi | Guatemala, Mexico, South Africa, United States, Indonesia |
| Sindija | Brazil, Latvia, India, United Kingdom, United States |
| Сінді | Ukraine |