Cognomen Рён (Ryoo 
, Рён 
) , all over the world, is a rare surname. The last name Рён is characteristic of New Zealand, where it is a rare surname, Canada, and the United States, where it is a very rare surname. Not in comparison with a country's population, the name is most common in the United States, Canada, and China. Likewise, Рён is the forename as well as the last name.