| BEDŘICH m Czech |
| FEDERICA f Italian |
| FEDERICO m Spanish, Italian |
| FEDERIGO m Italian |
| FIETE m German |
| FRED m English, Dutch, German, French, Portuguese |
| FREDDIE m & f English |
| FREDDY m English |
| FRÉDÉRIC m French |
| FREDERICA f Portuguese, English |
| FREDERICK m English |
| FREDERICO m Portuguese |
| FREDERIK m Danish, Dutch |
| FREDERIKKE f Danish |
| FRÉDÉRIQUE f French |
| FREDO m Italian (Rare) |
| FREDRIC m English |
| FREDRICK m English |
| FREDRIK m Swedish, Norwegian, Finnish |
| FREDRIKA f Swedish, Finnish |
| FREEK m Dutch |
| FRICIS m Latvian |
| FRIDERIK m Slovene |
| FRĪDRIHS m Latvian |
| FRIDURIC m Ancient Germanic |
| FRIEDERIKE f German |
| FRIEDRICH m German |
| FRIGYES m Hungarian |
| FRIÐRIK m Icelandic |
| FRIÐRIKA f Icelandic |
| FRITS m Dutch |
| FRITZ m German |
| FRITZI f German |
| FRYDERYK m Polish |
| FRYDERYKA f Polish |
| RICA f English (Rare) |
| RIIKA f Finnish |
| RIIKKA f Finnish |
| RIK m Dutch |
| RIKA f Swedish, Dutch |
| RIKE f German |
| RIKKE f Danish |