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Last name Guillain (Guillain
) , throughout the world, is a rare cognomen. The surname Guillain is habitual in Western Europe, particularly France, where it is quite a rare surname, Belgium, where it is a rare surname, and Switzerland. Also, Guillain is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Guillain | Belgium, Gabon, Switzerland, France, Democratic Republic of the Congo |