Surname Guérain (Guérain 
) , around the world, is a very rare cognomen. The last name Guérain is habitual in Western Europe, particularly Netherlands, where it is a very rare surname, and France.
| VARIANT | COUNTRY |
|---|---|
| Guérain | France, Netherlands |
| johannes christiaan guérain NL (b. 1881) |
|
|
| jan guérain NL (b. 1907) |
|
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| g.c.j. guérain |
|