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, India, Saudi Arabia, United States, Vietnam |
| Sinx | Netherlands, Thailand, China, India, United States |
| Sinkh | Malaysia, Spain, India |
| Синх | Russia, Kazakhstan, Kyrgyzstan |