Cognomen Riwaz (Riwaz 
) , all around the world, is a rare surname. The last name Riwaz is characteristic of Sri Lanka, where it is a rare surname, Pakistan, where it is a very rare surname, and Israel. In absolute terms, it is the most numerous in Southern Asia, particularly Sri Lanka, Pakistan, and India. Likewise, Riwaz is the forename as well as the last name.