All around the world, Гийом (Guillaume 
, Guilhem 
, Гийом 
) is a widespread male first name. The first name Гийом is habitual in France, where it is a common male name, Reunion, where it is quite a common male name, and Suriname (explore the name in all countries). Measured by absolute frequency, it is commonest in France, Cameroon, and the Democratic Republic of the Congo. Very seldom, Гийом is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Guillaume | Belgium, Cameroon, Ivory Coast, France, Democratic Republic of the Congo |
| Guilhem | Japan, Belgium, United States, Canada, France |
| Гийом | Russia, Ukraine |
| Gijom | Mexico, India, Malaysia |
Bill, Farel, Ghilherme, Giiom, Giyom, Guglielmo, Guilherme, Guillem, Guillen, Guillermo, Guillén, Gulielmus, Gwilherm, Gwilym, Hiyom, Vilem, Vilhelm, Vilhelmo, Viljem, Vilmos, Vilém, Wilhelm, Wilhelm Carl, Wiliam, Will, Willem, William, Williams, Wm., Μπιλ, Бил, Билл, Біл, Білл, Вил, Вилем, Вилл, Виллем, Вилль, Вилмос, Вилмош, Вилхелм, Вильгельм, Вильем, Вильмош, Вильям, Вилям, Вілем, Вільгельм, Вільмош,
Гийом is also a name for the fictitious and mythical characters: Guillaume de Saint-Béryl , character in Complot à Versailles; Guillaume Leserman , character in Plus belle la vie; Guillaume Tell , the operatic character in the opera William Tell by Gioachino Rossini; Guillaume , character in One Night Stand and Guillaume de Cerisay , the operatic character in the opera The Devils of Loudun by Krzysztof Penderecki.