Family name Касир (Kasir 
, Kathir 
, Касир 
) , all over the world, is a common cognomen. The surname Касир is habitual in United Arab Emirates, where it is quite a rare surname, Sri Lanka, and Oman. Not in comparison with a country's population, it most frequently occurs in India, Indonesia, and Sri Lanka. Likewise, Касир is the forename as well as the last name.