Surname Radoy (Радой 
, Radoy 
) , globally, is a rare cognomen. The family name Radoy is habitual in Bulgaria, where it is quite a rare surname, Germany, where it is a rare surname, and Spain, where it is a very rare surname. Measured by absolute frequency, it most frequently occurs in Bulgaria, Germany, and the United States. Likewise, Radoy is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Радой | Ukraine, Russia, Bulgaria, Kazakhstan |
| Radoy | Germany, Bulgaria, Bangladesh, Spain, United States |
| ulrich radoy German actor, DE (b. 1952) |
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| eva maria radoy German actress, DE (b. 1953) |
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| karin radoy DE (b. 1957) |
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