In the entire world, F-J (F-J 
) is an extremely rare unknown gender forename. Much less frequently, F-J is the last name as well as the forename. Parts of the name also exists independently as a last name F, and a first name J.
| VARIANT | COUNTRY |
|---|---|
| F-J | Spain, Canada, France, United States, United Kingdom |
| f-j hans researcher |
|
|
| f-j h hulsmans researcher (ORCID 0000-0003-1410-5789) |
|