FNBB
| Acronym | Definition |
|---|---|
| FNBB | First National Bank of Brookfield (Brookfield, IL) |
| FNBB | First National Bankers Bankshares, Inc. (Baton Rouge, LA) |
| FNBB | Fördergesellschaft für Nachhaltige Biogas-und Bioenergienutzung eV (German: Society for the Promotion of Sustainable Biogas and Bioenergy Association) |
| FNBB | First National Bank of Botswana (Gaborone, Botswana) |
| FNBB | Fédération Nigérienne Basketball (French: Nigerian Basketball Federation) |
| FNBB | First National Bank of Bellevue (Ohio) |