Ravidas
Ravidas or Raidas was an Indian mystic poet-saint of the Bhakti movement during the 15th to 16th century CE. Venerated as a guru (spiritual teacher) in the modern regions of Uttar Pradesh, Bihar, Rajasthan, Gujarat, Maharashtra, Madhya Pradesh, Punjab, and Haryana, he was a poet, social reformer and spiritual figure. The life details of Ravidas are uncertain and contested.