Family name לואוי (Loewy 
, לואוי 
) , worldwide, is quite a rare last name. The cognomen לואוי is characteristic of Austria, where it is quite a rare surname, Czechia, where it is a rare surname, and Australia. Measured by absolute frequency, this name is the most popular in the United States, Austria, and Germany. Much less frequently, לואוי is the forename as well as the last name.