Chempakaraman Pillai, alias Venkidi, (15 September 1891 – 26 May 1934) was an Indian-born political activist and revolutionary. Born in Trivandrum, Kerala, to Tamil parents, he left for Europe as a youth, where he spent the rest of his active life as an Indian nationalist and revolutionary. Although his life was mired in controversies, including a squabble with Adolf Hitler, information on his life in Europe was sketchy in the immediate years after his death. More information has come out in recent years.