Surname Синх (Sinh 
, Sinx 
, Sinkh 
) , in the entire world, is a prevalent last name. The last name Синх is characteristic of India, where it is a common surname, Macao, where it is quite a rare surname, and Vietnam. Measured by absolute frequency, the name is most common in India, Vietnam, and Malaysia.
| VARIANT | COUNTRY |
|---|---|
| Sinh | Malaysia, Vietnam, United States, Saudi Arabia, India |
| Sinx | Netherlands, Thailand, China, United States, India |
| Sinkh | Malaysia, India, Spain |
| Синх | Kazakhstan, Russia, Kyrgyzstan |