Sri Sampradaya or Sri Vaishnavism is a Vaishnava sect within Hinduism. Its origin and codification is generally traced back to Sri, Mahalakshmi eternal consort of Lord Vishnu. Around the 10th century when a collection of the devotional hymns and songs by Alvars was organized by Sri Nathamuni, who is considered to be one of the pioneers of the sect. Nathamuni appeared as the pioneer who wrote Sanskrit works systematizing the Sri Vaishnava theology, largely in debate with Gauttama philosophy of Buddhism. He was followed by Yamunacharya a celebrated grand-teacher of Ramanujacharya. Alavandar (Yamunacharya), like Ramanuja, focused both on philosophical debates like dvaita vs. advaita and bhakti prayers and the works attributed to him are in Sanskrit although he codified the heritage of the Tamil alvars. Works attributed to him are In this tradition Vishnu is believed to be the source of all avatars. Vishnu is the name of God in the whole Vaishnavism and he is also known as Narayana, Vasudeva and Krishna and behind each of those names is a divine figure with attributed supremacy in Vaishnavism and each associated tradition believed to be distinct historically. The Iyengar Brahmins are followers of Ramanuja sampradaya, and two sects, namely Vadakalai and Thenkalai exist among them. Sri Vaishnavism is a sub-denomination of Vaishnavism and a philosophical system of thought culminating in the philosophy of Visishtadvaita espoused by Ramanujacharya. Followers of Sri Vaishnavism, as Vaishnavas, generally worship Vishnu as the supreme God.