Cognomen 西雷 (Xilei 
, 西雷 , Clé 
) , in the entire world, is a rare family name. The last name 西雷 is characteristic of Belgium, where it is a rare surname, Angola, and Algeria. Measured by absolute frequency, this name is the most popular in China, Algeria, and Angola. More prevalently, 西雷 is the forename as well as the last name.