Cognomen Delquaglio (Delquaglio 
) , in all the world, is a very rare last name. The cognomen Delquaglio is characteristic of Northern America, particularly the United States, where it is an extremely rare surname. Much less frequently, Delquaglio is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Delquaglio | United States |