C. Vanniasingam

Coomaraswamy Vanniasingam (; 12 October 1911 – 17 September 1959) was a Ceylon Tamil lawyer, politician and member of parliament.

Early life and family Vanniasingam was born on 12 October 1911. He was the son of V. Coomaraswamy, a proctor and Tamil scholar from Tellippalai in northern Ceylon. Vanniasingam's brother was C. Balasingam, the Deputy Secretary to the Treasury.

Vanniasingam married Komathy, a daughter of the physician Srinivasan.

In 1948 division arose amongst ACTC members over the party leadership's decision to join the United National Party (UNP) led government. Vanniasingam was one of those who opposed joining the UNP government. The dissidents, led by S. J. V. Chelvanayakam, E. M. V. Naganathan and Vanniasingam, eventually left the ACTC and formed the Illankai Tamil Arasu Kachchi (Federal Party) in 1949. Vanniasingam served as president of ITAK.

Vanniasingam stood as the ITAK candidate in Kopay at the 1952 parliamentary election and was re-elected. Vanniasingam was one of only two ITAK MPs elected and, with ITAK leader Chelvanayakam out of Parliament, Vanniasingam functioned as the parliamentary leader of the party. Following the 1958 riots, ITAK and the Jathika Vimukthi Peramuna (National Liberation Front) were banned. ITAK's leaders, including Vanniasingam, were arrested on 4 June 1958 as they left Parliament and imprisoned.

Vanniasingam died on 17 September 1959.