For 10 points, name this Malayalam-speaking Christian community from Kerala, named for an apostle who preached in India.
Members of this religious group often carry ornamental umbrellas to church services. In weddings celebrated by this non-Jewish community, the bride and groom sit under a canopy and she is given a gold cross strung from a necklace. Because they could not all physically touch it, hundreds of thousands of members of this community attached ropes to a granite cross to swear a 1653 oath at Coonan proclaiming their independence. They eat pesaha appam, unleavened bread dipped in syrup or milk, during Maundy Thursday. Resisting the Synod of Diamper and other (*) Portuguese attempts to bring them into the Catholic fold, members of this community formed the splinter Malankara Church. Roughly ten percent of this community is descended from eastward-migrating Syriac Christians, while the rest trace their heritage to the mission established by a Resurrection-doubting saint. For 10 points, name this Malayalam-speaking Christian community from Kerala, named for an apostle who preached in India.
Members of this religious group often carry ornamental umbrellas to church services.
Saint Thomas Christians [or Nasrani; or Northists; or Southists; or Knanaya; or Tekkumbhagar; or the Malabar Church; or the Malankara Church before mentioned; accept any answer include Thomas or a word form; prompt on Syriac Christians; prompt on Indian Christians] 