Surname Lonzen (Lonzen 
) , around the globe, is a very rare last name. The surname Lonzen is habitual in Switzerland, where it is a rare surname, Germany, where it is a very rare surname, and the United States, where it is an extremely rare surname. Much less frequently, Lonzen is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Lonzen | Germany, Switzerland, Brazil, United States |