Family name Läu (Läu 
) , all around the world, is a very rare cognomen. The surname Läu is characteristic of Western Europe, particularly Germany, where it is a very rare surname. Much less frequently, Läu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Läu | Germany, Colombia |
| alwin läu (b. 1904) |
|