Cognomen Courcy (库西 
, Courcy 
) , in the entire world, is quite a rare family name. The family name Courcy is characteristic of Canada, where it is quite a rare surname, Ireland, and France, where it is a rare surname. Measured by absolute frequency, the name is most common in Canada, France, and the United States. Very seldom, Courcy is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 库西 | China |
| Courcy | Canada, France, Ireland, United Kingdom, United States |
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john de courcy Anglo-Norman knight (b. 1160) |
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| jean de courcy French poet and writer, FR (b. 1340) |
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| jean de courcy (b. 1360) |
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| guillaume de courcy (b. 1362) |
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| patrick de courcy, 17th baron kingsale (died 1669) (b. 1660) |
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| almeric de courcy, 23rd baron kingsale Irish Baron (b. 1664) |
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| john de courcy (born 1687) (b. 1687) |
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| mary de courcy (born 1697) (b. 1697) |
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| gerald de courcy, 19th baron kingsale (1700-1759) (b. 1700) |
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| john de courcy, 20th baron kingsale (died 1776) (b. 1717) |
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| mary de courcy (born 1726) (b. 1726) |
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| elizabeth geraldina de courcy (born 1729) (b. 1729) |
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| eleanor elizabeth de courcy (born 1732) (b. 1732) |
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| michael de courcy admiral in the American Revolutionary War, IE (b. 1750) |
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alfred potier de courcy (1816-1888), FR (b. 1816) |
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