Cognomen Christoy (Christoy 
) , around the globe, is a very rare last name. The surname Christoy is habitual in Greece, where it is a very rare surname, and the United States, where it is an extremely rare surname. More prevalently, Christoy is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Christoy | India, United States, Democratic Republic of the Congo, Greece |