Cognomen Sik (Sik 
, Sig , Сик 
) , in the world, is a common surname. The last name Sik is habitual in Iceland, where it is quite a common surname, Taiwan, where it is quite a rare surname, and Hungary. Not in comparison with a country's population, it most frequently occurs in India, China, and Taiwan. Much less frequently, Sik is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sik, Sig | Malaysia, China, South Korea, India, Taiwan |
| Сик | Ukraine, Russia |
| ซิกข์ | Thailand |
Bask, Begi, Sere, Shik, Shì, Shí, Sick, Sidik, Siga, Sige, Siika, Sikiş, Siksika, Siktir, Six, Such, Suus, Sìk, Sík, Sîk, Sïk, Sįk, Sık, Sịk, Zeek, Çik, Çîk, Çık, Śîk, Ŝik, Šik, Šík, Šïķ, Сік, Шик, سيك, ซิก, ซิค, สิกข์, ស៊ីក, シキ, シク, 司克, 嗣克, 四克, 式, 思克, 斯克, 植, 西克, 識, 识, 锡克, and 식
| sune sik Swedish politician, SE (b. 1154) |
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| sune sik (b. 1297) |
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| józsef sik (b. 1857) |
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| lavoslav sik (b. 1881) |
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| ladislav sik holocaust victim, b. 1914-05-10, AT (b. 1914) |
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| sik endre Hungarian economist, sociologist, university teacher, HU (b. 1948) |
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| miroslav sik Czech university educator, CH (b. 1953) |
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| martin sik researcher (ORCID 0000-0003-2088-2330) |
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| robert h sik National Institute of Environmental Health Sciences; Duke University |
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| frantisek sik Ph.D. |
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| sik márton Hungarian canoeist olympican kayak man, HU (b. 1981) |
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| kim sik South Korean bobsledder, KR (b. 1985) |
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