Family name Gui-Diby (Gui-Diby 
) , worldwide, is quite a rare surname. The surname Gui-Diby is characteristic of Sub-Saharan Africa, particularly the Democratic Republic of the Congo, where it is quite a rare surname. Parts of the name also exists independently as a last name Gui, and a last name Diby.
| VARIANT | COUNTRY |
|---|---|
| Gui-Diby | Democratic Republic of the Congo |