Prathivadhi Bhayankaram Annan was a Sri Vaishnava Acharya, Sanskrit scholar and the composer of the popular Venkateswara Suprabhatam. He appeared in this world bearing the name Hasthigirinathar Annan in the year AD 1361. He was one of the prominent disciples of Manavala Mamunigal, belonged to a distinguished line of "Acharya Purushas" and had a large number of followers. Annan composed many hymns, of which the popular Venkatesa Suprabhatham, Venkatesa Stotram, Venkatesa Prapatti and Venkatesa Mangalashasanam are recited daily at the Tirumala Venkateswara Temple at the wee-hours of the day to wake up the Lord
