Last name Larosch (Larosch 
) , all around the world, is a rare cognomen. The last name Larosch is characteristic of Western Europe, particularly Luxembourg, where it is quite a rare surname, Germany, where it is a very rare surname, and Netherlands. Measured by absolute frequency, it is commonest in Western Europe, particularly Germany, France, and Luxembourg. Very seldom, Larosch is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Larosch | Germany, Luxembourg, Netherlands, France, United States |