Cognomen Costy (Costy 
) , around the globe, is quite a rare family name. The surname Costy is habitual in Romania, where it is quite a rare surname, Ghana, and France, where it is a rare surname. Also, Costy is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Costy | Romania, Italy, Ghana, United States, France |
| claude costy French-Swiss architect, FR (b. 1931) |
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