Last name Gillardon (Gillardon 
) , worldwide, is a rare family name. The surname Gillardon is characteristic of Switzerland, where it is a rare surname, Germany, where it is a very rare surname, and the United States, where it is an extremely rare surname. Very seldom, Gillardon is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gillardon | United States, Germany, Switzerland |
| wilhelm gillardon (b. 1879) |
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| silvia gillardon CH (b. 1950) |
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| f. gillardon researcher |
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