Surname Lannen (Lannen 
) , throughout the world, is quite a rare last name. The cognomen Lannen is habitual in Czechia, where it is quite a rare surname, Ireland, where it is a rare surname, and Australia. Measured by absolute frequency, it most frequently occurs in the United States, the United Kingdom, and Czechia. Very seldom, Lannen is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Lannen | Australia, Finland, Czechia, United Kingdom, United States |