Around the globe, Гуиллауме (Guillaume 
, Гуиллауме 
) is a widespread boy's first name. The first name Гуиллауме is characteristic of France, where it is a common boy's name, Reunion, where it is quite a common masculine name, and Suriname (explore the name in all countries). Measured by absolute frequency, this name is the most popular in France, Cameroon, and the Democratic Republic of the Congo. Very seldom, Гуиллауме is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Guillaume | France, Cameroon, Belgium, Democratic Republic of the Congo, Ivory Coast |
| Гуиллауме | Russia |
Гуиллауме 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.