Family name Curtain (Curtain 
, Cortine 
, Katiin) , across the world, is quite a rare cognomen. The surname Curtain is habitual in Jersey, where it is quite a common surname, Australia, where it is quite a rare surname, and Ireland, where it is a rare surname. Not in comparison with a country's population, the name is most common in Australia, the United States, and China. Much less frequently, Curtain is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Curtain | China, Australia, United Kingdom, Ireland, United States |
| Cortine | Colombia, Spain, Argentina, France, United States |
Corteyn, Cortyn, ต๊ะม่าน, ม่านต๊ะ, and ม่านมุ่งศิลป์
| cornelius curtain (1660-1724), IE (b. 1660) |
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| cornelius curtain (b. 1658) |
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| johanna curtain Australian religious sister, AU (b. 1827) |
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| john curtain (1835-1905) publican, politician and entrepreneur, IE (b. 1835) |
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| ruth f. curtain Australian mathematician (1941-2018), AU (b. 1941) |
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| dermot mac curtain Irish hurler, IE (b. 1957) |
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| peter curtain Australian rules footballer, AU (b. 1962) |
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| kevin curtain Australian motorcycle racer, AU (b. 1966) |
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| andrew curtain NZ (b. 1967) |
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| william curtain Peerage person ID=379918 |
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| colin m curtain researcher |
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| cyril c. curtain researcher |
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| james curtain Peerage person ID=269390 |
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| roger curtain researcher |
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| richard curtain researcher |
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