Iyers, also spelled as Ayyar, Aiyar, Ayer, or Aiyer, are described as an ethnoreligious community within the Tamil Brahmin population. The majority of Iyers follow the Advaita philosophy established by Adi Shankara and adhere to the Smarta tradition. This distinguishes them from the Iyengar community, who follow Sri Vaishnavism. Together, Iyers and Iyengars are collectively referred to as Tamil Brahmins and are classified under the Pancha Dravida Brahmana grouping in India. In addition to commonly using “Iyer” or “Aiyar” as a surname, members of the community also frequently adopt other surnames such as Sastri or Bhattar.

Iyer Brahmin belongs to the largest Brahmin community of South India. Tamil Nadu is their home state, though there is a large number of Iyers in Kerala as well. They are mostly engaged in administration. Slow to change, the Iyers still cherish their age-old Brahminical customs and practices. This community has made a great contribution to the literary and cultural heritage of South India.

