Last name Cis (Cis 
, Cosine 
, 茜丝 
) , across the world, is quite a rare surname. The surname Cis is habitual in Latvia, where it is quite a rare surname, Myanmar, where it is a rare surname, and Ukraine. Measured by absolute frequency, it is commonest in Myanmar, Indonesia, and Ukraine. Also, Cis is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Cis | Myanmar, Poland, Indonesia, Argentina, Democratic Republic of the Congo |
| Cosine | Brazil, Spain, United States, Taiwan, Philippines |
| 茜丝 | China |
| Цис | Kazakhstan, Ukraine, Russia |
| cis corman American casting director (b. 1926) |
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| kazimierz cis (b. 1919) |
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| cis lenerts printmaker (b. 1940) |
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| estela de frutos cis Uruguayan writer, UY (b. 1945) |
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| cis schepens Belgian politician, BE (b. 1948) |
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| cis van heertum (b. 1958) |
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| cis vrijmoeth researcher |
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| ricardo alberto cis AR |
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| cis bierinckx BE |
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| cis daane |
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| cis zweers |
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| cis vanhoutte |
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