Family name 延加 (Iyengar 
, 延加 
) , in the world, is quite a common surname. The cognomen 延加 is habitual in Western Asia, particularly United Arab Emirates, where it is quite a rare surname, Bahrain, and Oman. Not in comparison with a country's population, the name is most common in India, the United States, and United Arab Emirates. Much less frequently, 延加 is the forename as well as the last name.