Thiagarajah or Thiyagarajah () is a Tamil male given name. Due to the Tamil tradition of using patronymic surnames it may also be a surname for males and females.
Notable people Given name Tyagaraja (1767–1847), Indian composer A. Thiagarajah (1916–1981), Sri Lankan politician M. Thiyagarajah, Sri Lankan politician M. D. Thyagaraja Pillai, Indian politician M. K. Thyagaraja Bhagavathar (1910–1959), Indian actor
Surname Chelvy Thiyagarajah (died 1991), Sri Lankan poet Daniel Thiagarajah, Sri Lankan bishop J. Tyagaraja (born 1895), Ceylonese politician Thiyagarajah Maheswaran (1966–2008), Sri Lankan politician
See also Thyagaiah (1946 film), 1946 Indian film about Tyagaraja