Cognomen Ducin (Ducin 
) , all over the world, is a rare last name. The cognomen Ducin is characteristic of Poland, where it is a rare surname, Romania, and Argentina, where it is a very rare surname. Also, Ducin is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ducin | Argentina, Romania, Philippines, Poland, Democratic Republic of the Congo |