Worldwide, Jahnson (Jahnson 
) is a very rare masculine first name. The given name Jahnson is habitual in Tanzania, where it is a very rare masculine name, Philippines, and India, where it is an extremely rare boy's name. Likewise, Jahnson is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Jahnson | Sweden, India, United States, Tanzania, Poland |