Last name والين (Wallen 
, Wallin , Wellin 
) , in all the world, is a common surname. The last name والين is characteristic of Northern Europe, particularly Sweden, where it is a common surname, Guernsey, where it is quite a common surname, and Finland (explore the name in all countries). Measured by absolute frequency, the name is most common in the United States, Sweden, and Finland. Much less frequently, والين is the forename as well as the last name.