Family name Herlan (Herlan 
) , around the globe, is quite a rare cognomen. The last name Herlan is habitual in Latin America and the Caribbean, particularly Honduras, where it is quite a rare surname, Argentina, and Nicaragua. Measured by absolute frequency, the name is most common in Indonesia, Argentina, and Germany. More prevalently, Herlan is the forename as well as the last name.
| peter herlan American lepidopterist, museum curator, author and collector, US (b. 1909) |
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| anne herlan researcher |
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| stephan herlan researcher |
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