Cognomen Лей (Ley 
, Leu , Lej 
) , all around the world, is a common last name. The last name Лей is habitual in Switzerland, where it is quite a common surname, Liechtenstein, and Mauritius (explore the name in all countries). Measured by absolute frequency, the name is most common in Germany, the United States, and Malaysia. Much less frequently, Лей is the forename as well as the last name.