Cognomen Keulers (Keulers 
) , throughout the world, is a rare family name. The family name Keulers is characteristic of Western Europe, particularly Netherlands, where it is quite a rare surname, Belgium, where it is a rare surname, and Germany, where it is a very rare surname.
| VARIANT | COUNTRY |
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| Keulers | Belgium, Netherlands, France, Germany, United States |
| peter heinrich keulers German journalist (1896-1963), DE (b. 1896) |
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| jan jozef dominicus keulers (b. 1890) |
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| tom g h keulers researcher (ORCID 0000-0001-5648-2203) |
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| yara keulers Dutch association football player, NL (b. 1990) |
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