Irudayaraj or Iruthayaraj () is a Tamil Christian surname and masculine given name meaning Sacred Heart. It is most commonly found in Tamil Nadu state in South India. Notable people with the name include:
Inigo S. Irudayaraj (), Indian politician Joseph Irudayaraj (born 1961), American engineer and chemist Joseph Anthony Irudayaraj (1935–2019), former bishop of the Roman Catholic Diocese of Dharmapuri, India Savarinathen Iruthayaraj (1927–2001), former Bishop of the Roman Catholic Diocese of Palayamkottai, India
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