Last name Waif (Waif 
, Weif 
, Wayve 
) , in all the world, is a very rare cognomen. The last name Waif is characteristic of Saudi Arabia, where it is a very rare surname, Israel, and the United States, where it is an extremely rare surname. In absolute terms, it is the most numerous in Saudi Arabia, China, and the United States. Likewise, Waif is the forename as well as the last name.