| AADOLF m Finnish |
| AATTO m Finnish |
| AATU m Finnish |
| ADALWOLF m Ancient Germanic |
| ADOLF m German, Dutch, Swedish, Norwegian, Danish, Czech, Ancient Germanic |
| ADOLFITO m Spanish |
| ADOLFO m Italian, Spanish |
| ADOLPH m English |
| ADOLPHE m French |
| ADOLPHUS m Ancient Germanic (Latinized) |
| ALF (3) m Swedish, Norwegian, Danish |
| DÖLF m Limburgish |
| DOLPH m English |
| DULF m Limburgish |
| FITO m Spanish |
| HRODULF m Ancient Germanic |
| HROLF m Ancient Germanic |
| HRÓLFR m Ancient Scandinavian |
| HRÓÐÓLFR m Ancient Scandinavian |
| RODOLF m German (Rare), Dutch (Rare) |
| RODOLFITO m Spanish |
| RODOLFO m Italian, Spanish, Portuguese |
| RODOLPH m English (Rare), French (Rare) |
| RODOLPHE m French |
| ROEL m Dutch |
| ROELOF m Dutch |
| ROFFE m Swedish |
| ROLF m German, Swedish, Norwegian, Danish, English |
| ROLLO m English |
| ROLO m English (Rare) |
| ROLPH m English (Rare) |
| ROUL m Medieval French, Medieval English |
| RUDI m German, Hungarian |
| RUDOLF m German, Dutch, Swedish, Norwegian, Danish, Polish, Czech, Hungarian, Slovene, Croatian, Russian, Armenian |
| RUDOLPH m English |
| RUDY m English |
| RUEDI m German (Swiss) |
| RUUD m Dutch |
