In all the world, Horstmann (Horstmann 
) is an extremely rare unknown gender first name. Predominantly, Horstmann is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Horstmann | Germany, South Africa, United States, Denmark, Brazil |
Horstmann is also a name for the fictitious and mythical characters: .
| lally horstmann German writer, DE (b. 1898) |
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| roy horstmann American football player (1910-1998), US (b. 1910) |
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| hauke horstmann researcher |
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| reed horstmann actor |
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| lara horstmann researcher |
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| fee denise horstmann |
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