Family name カイフ (Kaif 
, カイフ 
) , in the world, is quite a common last name. The cognomen カイフ is habitual in Western Asia, particularly United Arab Emirates, where it is quite a rare surname, Saudi Arabia, and Oman. In absolute terms, it is the most numerous in India, Bangladesh, and Saudi Arabia. Likewise, カイフ is the forename as well as the last name.