Last name Ketelaer (Ketelaer 
) , in all the world, is a rare cognomen. The last name Ketelaer is characteristic of Western Europe, particularly Belgium, where it is quite a rare surname, Switzerland, where it is a rare surname, and Germany.
| VARIANT | COUNTRY |
|---|---|
| Ketelaer | Germany, Switzerland, Belgium, United States |
| nicolaus ketelaer (b. 1450) |
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marco ketelaer German association football player, DE (b. 1969) |
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marcel ketelaer German footballer, DE (b. 1977) |
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| eva ketelaer Dr. rer. nat. Karlsruher Institut für Technologie (KIT) 2013 |
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| nicolaus ketelaer |
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| karim ketelaer German handball player, DE (b. 1993) |
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