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 | Indonesia, Saudi Arabia, South Africa, United States, Iraq |
| Cyndi | Indonesia, South Africa, Guatemala, Mexico, United States |
| Sindija | United Kingdom, United States, Latvia, India, Brazil |
| Сінді | Ukraine |