Cognomen Kas (Kas 
, كاس 
, Caste 
) , in all the world, is a common family name. The family name Kas is characteristic of Curacao, where it is quite a common surname, Lithuania, where it is quite a rare surname, and Brunei. In absolute terms, it is the most numerous in Turkey, Sudan, and Indonesia. Also, Kas is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kas | Algeria, Indonesia, India, Saudi Arabia, Turkey |
| كاس | Egypt, Algeria, Iran, Sudan, Iraq |
| Caste | Italy, France, India, Morocco, United States |
| 喀斯 | China |
Cas, Casa, Cass, Cassa, Casse, Escasa, Ka, Kaasas, Kaci, Kai, Kast, Kaç, Kaś, Kaš, Kol, Kur, Kàs, Kàš, Kás, Kása, Kâ, Kâs, Kãs, Kãç, Kös, Kās, Kąs, Tur, Ķáś, Ķâ, Ķãç, Ķãš, Κας, Касс, כאס, קאס, קאש, كآس, كأس, كةس, کاس, กัส, อกัส, កាស, កាស់, カス, 克阿西, 加斯, 加西, 卡斯, 卡西, 咔斯, 咔西, 咖西, 垰西, 鉲西, ﻛﺄﺱ, ﻛﺎﺱ, and Ｋａｓ
| achiel kas painter and lithographer, BE (b. 1861) |
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| kas maine sharecropper in the Transvaal, South Africa, ZA (b. 1894) |
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kas van iersel Dutch presenter / journalist, NL (b. 1956) |
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antonius johannes kas Dutch actor, NL (b. 1959) |
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| kas kastner American racing engineer, US (b. 1925) |
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| kas vidruk Canadian football player, CA (b. 1925) |
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| kas de graaf (b. 1916) |
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| kas woudsma Dutch association football player (1928-2003), NL (b. 1928) |
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christopher kas German tennis player, DE (b. 1980) |
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| abram kas holocaust victim, b. 1931, BY (b. 1931) |
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| julak kas holocaust victim, b. 1933 (b. 1933) |
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| kas deprez 1945--2000-12-17; Deprez, K. (b. 1945) |
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| kas oosterhuis Dutch architect, NL (b. 1951) |
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| karlheinz kas German journalist, DE (b. 1955) |
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| kas rita Hungarian and German chess player, HU (b. 1956) |
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