Solution:Traditionally, the number of Alvars and Nayanars was 12 and 63. In South India, during the 9th and 10th centuries, Vaishnavite saints were called Alvars, and Shaivite saints were called Nayanars. Among the Alvar saints, Tirumangai, Periya, Andal, and Namalvar were prominent, while among the Nayanar saints, Appar, Tirugnana, Sambandar, and Sundaramurthy were prominent. The collection of verses by Nayanar saints is called Thirumudai.