Surname Ickx (Ickx 
, Икс 
, イクス) , throughout the world, is a rare cognomen. The cognomen Ickx is habitual in Belgium, where it is quite a rare surname, Kazakhstan, where it is a rare surname, and Kyrgyzstan, where it is a very rare surname. Not in comparison with a country's population, this name is the most popular in Belgium, Russia, and Kazakhstan. Much less frequently, Ickx is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Ickx | Belgium, Spain, United States, Canada, France |
| Икс | Kyrgyzstan, Kazakhstan, Russia |
| romain ickx Belgian photographer, BE (b. 1860) |
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jacky ickx Belgian racecar driver, BE (b. 1945) |
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| pierre ickx belgian illustrator (1899-1970), BE (b. 1899) |
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| jacques ickx Belgian motocross rider, BE (b. 1910) |
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vanina ickx auto racer, BE (b. 1975) |
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| pascal ickx Belgian racing driver, BE (b. 1937) |
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| johan ickx (b. 1962) |
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| larissa ickx Belgian painter, BE (b. 1973) |
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| gaétan ickx researcher (ORCID 0000-0001-5164-2538) |
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| mario ickx Belgian bicycle racer, BE (b. 1984) |
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| harshad bruno ickx BE |
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| clem ickx artist, BE (b. 1990) |
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| andré ickx BE |
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Mr, Simon, Steve, Andre, Chris, Karin, Kenny, Peter, Ragna, Ricky, David, Dries, Greet, Lieve, Louis, Lotte, Loïc, Jacky, Johan, Tessa, Tirza, Tilly, Sarah, Marco, Marta, Mario, Ms, Ann, Bob, Rom, Luc, Jan, Joy, Marc, Sven, Arne, Nancy, Kris, Rene, Davy, Dimi, Gert, Lars, Loic, Jack, Niki, Inge, Ilse, Paul, and Nikki