Surname สหาก (Sahak 
, สหาก 
) , globally, is a common family name. The family name สหาก is characteristic of Afghanistan, where it is quite a common surname, Malaysia, and Brunei, where it is quite a rare surname. Not in comparison with a country's population, it is commonest in India, Afghanistan, and Malaysia. Very seldom, สหาก is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sahak | Philippines, India, Indonesia, Afghanistan, Malaysia |
| สหาก | Thailand |