Surname Sigau (Sigau 
) , in all the world, is a rare family name. The surname Sigau is habitual in Malaysia, where it is a rare surname, Indonesia, where it is a very rare surname, and Germany, where it is an extremely rare surname. Not in comparison with a country's population, it is the most numerous in Malaysia, Indonesia, and Nigeria. Much less frequently, Sigau is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sigau | Nigeria, Germany, Malaysia, India, Indonesia |