Last name Dethy (Dethy 
) , in the entire world, is a rare surname. The last name Dethy is habitual in Belgium, where it is quite a rare surname, France, where it is a very rare surname, and the United States, where it is an extremely rare surname. Likewise, Dethy is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Dethy | United States, France, Indonesia, Belgium, Democratic Republic of the Congo |
| joseph dethy (b. 1838) |
|
|
| théophile dethy BE (b. 1855) |
|
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| stephane dethy BE |
|