Cognomen Isif (Isif 
) , all over the world, is a very rare family name. The last name Isif is habitual in Israel, where it is a very rare surname, Spain, where it is an extremely rare surname, and the United States. Not in comparison with a country's population, it is commonest in the United States, India, and Spain. More frequently, Isif is the forename as well as the last name.