Family name Ронья (Ronja 
, Ронья, Rogniat 
) , in the entire world, is a rare cognomen. The cognomen Ронья is characteristic of Finland, where it is a rare surname, Germany, where it is a very rare surname, and Indonesia. In absolute terms, this name is the most popular in Indonesia, Germany, and India. Predominantly, Ронья is the forename as well as the last name.