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