A Rajarshi is a king who turned into a royal sage, or Rajarshi. A rajarshi will not have to leave the kingship to became rishi as in the example of Vishwamitra (who later advanced to becoming a Brahmarishi) but still while ruling the kingdom has reached a state of rishi and have attained self-realization.
"Rajarshi" is the name of the novel by Rabindranath Tagore, based on the life of a king of the state of Tripura, named Govindamanikya. Purushottam Das Tandon,a freedom fighter from India was addressed reverentially as "Rajarshi."A soft hearted king whose kingdom was his life.One morning while he was in the way to his bathing ghat, he fortunately met two children, a brother and a sister who were heading towards the flower bushes for the collection of flowers for the puja offerings. Maharaja noticed them and asked for a conversation by starting with them asking about their reason of heading towards the flower bushes.That conversation lasted for a few time but became a daily routine.that routine conversation brought all the change and gave the novel a new turn towards the objective of the novel.There conversation one day pickled the query of stopping the former ritual of sacrificing bulls in front of the lord and does brought the disaster in the kingdom . Chatrapati Shahu, ruler of princely state of Kolhapur, well known for his social reforms in modern India is remembered as Rajarshi. Rajarshi Udai Pratap (Bhinga Raj). Mr. James Jesse Lynn, disciple of Paramhansa Yogananda was also referred to by the title of the Rajarshi, as Rajarsi Janakananda.