Family name גיו (Gyu 
, Guillot 
, גיו 
) , in the world, is a common last name. The cognomen גיו is habitual in France, where it is quite a common surname, Luxembourg, where it is quite a rare surname, and Mauritius. Measured by absolute frequency, it is commonest in France, the United States, and Myanmar. Very seldom, גיו is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gyu | China, South Korea, Myanmar, United States, France |
| Guillot | China, Spain, United States, France, Democratic Republic of the Congo |
| גיו | Israel |