Cognomen Iuva (Юва 
, Iuva 
) , all over the world, is a very rare last name. The cognomen Iuva is habitual in Kyrgyzstan, where it is a very rare surname, Ukraine, and Russia. Not in comparison with a country's population, this name is the most popular in Russia, India, and Ukraine. Much less frequently, Iuva is the forename as well as the last name.