Surname Rju (Rju 
, リュ 
, Рю 
) , in all the world, is a rare family name. The cognomen Rju is characteristic of Russia, where it is a very rare surname, Kyrgyzstan, and Bangladesh. Measured by absolute frequency, this name is the most popular in Russia, Bangladesh, and India. Likewise, Rju is the forename as well as the last name.