In all the world, Radulf (Radulf 
, Radulfus ) is a very rare masculine first name. The first name Radulf is habitual in Western Europe, particularly Germany, where it is a very rare male name.
| VARIANT | COUNTRY |
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| Radulf | Germany, France, Philippines, Brazil, United States |
| Radulfus | Brazil |
| radulf, king of thuringia 7th-century noble, Duke and then King (b. 600) |
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| radulf, count of besalú 10th-century Catalan nobleman (b. 850) |
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radulf ii, abbot of kinloss Scottish abbot, GB (b. 1100) |
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| radulf de lamley Roman Catholic bishop (b. 1101) |
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| radulf of brechin Scottish Bishop (b. 1101) |
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| radulf, graf von castell-rüdenhausen (born 1922) (b. 1922) |
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| radulf beuleke German author, DE (b. 1946) |
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| radulf of lincoln British bishop |
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| radulf de lamblay catholic bishop |
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| radulf ii, duke of thuringia 9th century Thuringian ruler |
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| radulf of narbonne |
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