Sundarar (Tamil: சுந்தரர்), also referred to as Chuntarar, Chuntaramurtti, Nampi Aruran or Tampiran Tolan, was an eighth-century poet-saint of Tamil Shaiva Siddhanta tradition of Hinduism. He is among the Tevaram trio, and one of the most prominent Nayanars, the Shaiva bhakti (devotional) poets of Tamil Nadu.
His hymns form the seventh volume of the Tirumurai, the twelve-volume compendium of Shaiva Siddhanta. His songs are considered the most musical in Tirumurai in Tamil language. His life and his hymns in the Tevaram are broadly grouped in four stages. First, his cancelled arranged marriage through the intervention of Shiva in the form of a mad petitioner and his conversion into a Shaiva bhakt. Second, his double marriage to temple dancers Paravai and Cankali with their stay together in Tiruvarur. Third, his blindness and then return of his sight. Finally, his reflections on wealth and material goods.
Sundarar is referred to by many names. Sundarar (Chuntarar) means "the lovely, handsome one". He was adopted by regional feudatory dedicated to Shiva, and that brought the name "Aruran". Peers and the generations that followed him called him "Tampiran Tolan", which means "intimate companion, dedicated friend of the lord [Shiva]".
The Tevaram hymns compositions of Sundarar are a source of biographical information about him, as are the hagiographic texts written about him few centuries after he died. Sundarar was born in Tirunavalur in a Shaiva Brahmin family to Sadaiya Nayanar and Isaignaniyar towards the end of the 7th century. He was adopted by the Narasinga Munaiaraiyar Kashatriya family, a Pallava feudatory (Thirumunaipadi-Nadu, an adoption that gave him a luxurious childhood.
Sundarar is unique among the Nayanars in that both of his birth parents are also recognized as Nayanars (poet-saints of Tamil Shaivism). They were temple priests and accepted the adoption request of the local feudatory. Once he came of age, his adopted family arranged his marriage.