Zerodha's 37-year-old Co-founder Nikhil Kamath is the youngest billionaire among India's 100 richest people, according to Forbes. His older brother Nithin Kamath is the second youngest billionaire at the age of 44. The brothers have been ranked at the 40th position on the Forbes list of India's 100 Richest with a combined net worth of $5.5 billion.