Cognomen レヤ (Reja 
, レヤ 
) , throughout the world, is a common family name. The cognomen レヤ is characteristic of Slovenia, where it is quite a common surname, Qatar, where it is quite a rare surname, and Bangladesh. Measured by absolute frequency, it is the most numerous in India, Bangladesh, and Indonesia. Much less frequently, レヤ is the forename as well as the last name.