Purushottam Das Tandon पुरुशोत्तम दास टंडन August 1, 1882 - July 1, 1962), was a freedom fighter from Uttar Pradesh in India, of Khatri descent. He is widely remembered for his efforts in achieving the "Official Language of India" status for Hindi. He was customarily given the title Rajarshi (Etymology: Raja + Rishi = Royal Saint). Wikipedia
The definitive Wikipedia entry for Purushottam Das Tandon. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Purushottam_Das_Tandon