Surname ואניו (Vanio 
, ואניו 
) , around the world, is a rare family name. The surname ואניו is characteristic of Angola, where it is a rare surname, Indonesia, where it is a very rare surname, and Israel. In absolute terms, it is the most numerous in Angola, Indonesia, and the United States. More prevalently, ואניו is the forename as well as the last name.