Last name Delker (Delker 
) , across the world, is quite a rare surname. The cognomen Delker is characteristic of Germany, where it is a rare surname, the United States, and Argentina. Much less frequently, Delker is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Delker | Mexico, United States, Argentina, Peru, Germany |
| eddie delker American baseball player, US (b. 1906) |
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| del delker American contralto sacred music vocalist, US (b. 1924) |
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| martin delker German modern pentathlete, DE (b. 1958) |
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| carolin delker researcher |
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| erin delker researcher |
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| brianna c delker researcher |
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| don a delker researcher (ORCID 0000-0002-6104-3093) |
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| andreas delker researcher |
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