Cognomen Birklein (Birklein 
) , across the world, is a rare surname. The surname Birklein is characteristic of Germany, where it is a rare surname, New Zealand, where it is a very rare surname, and Canada, where it is an extremely rare surname. Very seldom, Birklein is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Birklein | New Zealand, Canada, United States, Germany |
| frank birklein researcher (ORCID 0000-0002-6672-4226) |
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| thomas birklein |
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