Last name Guersoy (Guersoy 
) , in the entire world, is a rare cognomen. The surname Guersoy is habitual in Austria, where it is a rare surname, Germany, and the United States, where it is an extremely rare surname. Much less frequently, Guersoy is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Guersoy | Germany, Austria, United States |