In all the world, Radai (รัศมี 
, Radai 
, Радай 
) is a common dominantly girly, but infrequently male first name. The first name Radai is characteristic of Thailand, where it is quite a common largely girly, but infrequently male name, Algeria, where it is a rare female name, and Mexico, where it is a rare unisex name. Measured by absolute frequency, it is the most numerous in Thailand, India, and Mexico. Very seldom, Radai is the last name as well as the forename.