| Abbreviation | Definition |
|---|---|
| FNB | Friendly Neighborhood Bank |
| FNBA | First National Bank Alaska |
| FNBA | First National Bank of Absecon |
| FNBA | First National Bank of America |
| FNBA | First National Bank of Anchorage |
| FNBC | First National Bank of Crossett |
| FNBC | First Nations Bank of Canada |
| FNBD | First National Bank DeRidder |
| FNBD | First National Bank of Dieterich |
| FNBD | First National Bank Of Durango |
| FNBF | First National Bank Fredericksburg |
| FNBF | First National Bank in Frankfort |
| FNBF | First National Bank of Florida |
| FNBF | First National Bank of Fredericksburg |
| FNBJ | First National Bank Johnson |
| FNBJ | First National Bank of Johnson |
| FNBN | First National Bank of Newtown |
| FNBN | First National Bank of Niagara |
| FNBO | First National Bank Oelwein |
| FNBO | First National Bank of Omaha |