Surname Columban (Columban 
) , all over the world, is a rare last name. The cognomen Columban is habitual in Aland Islands, where it is quite a common surname, Romania, where it is a rare surname, and Tanzania, where it is a very rare surname. More prevalently, Columban is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Columban | Tanzania, Brazil, Myanmar, Aland Islands, Romania |
Columbanus, and Kolumban