Vaishnavism is distinguished from other schools of Hinduism by its primary worship of deities Vishnu and his Avatars as the Supreme forms of God.
The ascetic Vishnuswami formed the Rudra-Sampradaya,[1][2] though the sampradaya is believed to have traced its origins to the Hindu deity Shiva, also known as Rudra, who passed on the knowledge imparted to him by Vishnu, on mankind.
According to Vaishnavism, Shiva, who has the Shaivism school dedicated to his worship as the Supreme God, is the first and foremost Vaishnava, or follower of Vishnu.
According to the tradition, Vishnuswami was fifteenth in the line of passing of the knowledge from teacher to student.
Not much about the historical Vishnuswami is known and all his works are thought to have been lost in time.