Cognomen Білаонова-Дяченко (Білаонова-Дяченко 
) , throughout the world, is an extremely rare last name. The last name Білаонова-Дяченко is habitual in Eastern Europe, particularly Ukraine, where it is an extremely rare surname. Parts of the name also exists independently as a last name Білаонова, and a last name Дяченко.
| VARIANT | COUNTRY |
|---|---|
| Білаонова-Дяченко | Ukraine |