Samuel James Veluppillai Chelvanayakam (Tamil: சாமுவேல் ஜேம்ஸ் வேலுப்பிள்ளை செல்வநாயகம், romanized: Cāmuvēl Jēms Vēluppiḷḷai Celvanāyakam; 31 March 1898 – 26 April 1977) was a Malaysian-born Ceylonese Tamil lawyer, politician and Member of Parliament. He was the founder and leader of the Illankai Tamil Arasu Kachchi (ITAK) and Tamil United Liberation Front (TULF) and a political leader of the Ceylon Tamil community for more than two decades. Chelvanayakam has been described as a father figure to Ceylon's Tamils, to whom he was known as "Thanthai Chelva" (father Chelva).