Cognomen Difabio (Difabio 
) , throughout the world, is quite a rare surname. The surname Difabio is habitual in Argentina, where it is a rare surname, the United States, and Australia. In absolute terms, it is the most numerous in the United States, Argentina, and Italy.
| VARIANT | COUNTRY |
|---|---|
| Difabio | Australia, Argentina, United States, Italy, Canada |