Kasi Nayinar Pararacacekaran (Tamil: காசி நயினார் பரராஜசேகரன்) (died 1570) was of one of the Aryacakravarti rulers of Jaffna kingdom who followed in the chaotic period after the death of Cankili I(1519–1561), and he removed Puviraja Pandaram. He was not from royal family, which made despite against him, and his enemies approached Portuguese, who ruled from Mannar. Portuguese utilized this opportunity and fought with Kasi Nayinar, and he was imprisoned. Portuguese appointed a king, and later he became victim to the supporters of Kasi Nayinar. After he rescued, again he ruled Jaffna and soon he poisoned by his servant with the support of Portuguese.

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