Xavier Thaninayagam, Sri Lankan scholar and academic (d. 1980)

Reverend Xavier S. Thani Nayagam (Tamil: சேவியர் தனிநாயகம், 2 August 1913 - 1 September 1980) was a Tamil scholar known for setting up the International Association for Tamil Research (IATR) and organising the first World Tamil Conference. He is praised as the "Roving Ambassador for Tamil".