Across the world, Вадя (Vadya 
, Vadia 
, Vadja 
) is quite a rare epicene first name. The forename Вадя is characteristic of Indonesia, where it is a rare girly name, Israel, where it is a rare epicene name, and India. Not in comparison with a country's population, the name is most common in India, Indonesia, and the United States. Likewise, Вадя is the last name as well as the forename.