Keshav Sitaram Thackeray (17 September 1885 – 20 November 1973; born Keshav Sitaram Panvelkar; also known as Keshav Sitaram Thakre and Keshav Sitaram Dhodapkar; commonly known by his pen name Prabodhankar Thackeray), was an Indian social reformer who campaigned against superstitions and social evils in India such as Untouchability, Child marriage and Dowry.
He was also a prolific author.
He was one of the key leaders of the Samyukta Maharashtra Samiti which successfully campaigned for the linguistic state of Maharashtra.
He was the father of Bal Thackeray, who founded the Shiv Sena, a pro-Marathi Hindu nationalist party leader.
He is also the grandfather of Shiv Sena leader & Current Chief Minister of Maharashtra Uddhav Thackeray and Maharashtra Navnirman Sena chief Raj Thackeray.