Cognomen Foolhardy (Hardi 
, Fol 
, Follis 
) , around the globe, is a common surname. The family name Foolhardy is characteristic of Brunei, where it is quite a common surname, Indonesia, where it is quite a rare surname, and Ghana. Measured by absolute frequency, the name is most common in Indonesia, the United States, and Ghana. Likewise, Foolhardy is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Hardi | Iraq, United States, Ghana, Indonesia, Democratic Republic of the Congo |
| Fol | France, Italy, United States, Indonesia, Malaysia |
| Follis | France, Argentina, Italy, United Kingdom, United States |