Globally, Ditlef (Ditlef 
) is an extremely rare male forename. More frequently, Ditlef is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Ditlef | Norway, Spain, Brazil, United States |
| ditlef wibe lund Norwegian politician (b. 1822) |
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| ditlef gottfried theodor bosse Dutch photographer, NL (b. 1842) |
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| ditlef pentz smith rustad Norwegian oceanograph, MG (b. 1901) |
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| ditlef lundgren |
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