Complex sentence: One of the twin sons-Thaervan Malaiyan (also given as Thaeveekan/Deiveegan)-later married thrice.The descendants of Thaervan is a Malaimaan, Nathamaan, Moopanar and Suruthimaan that it's collectively known as the Parkavakulam caste.
Split into simpler sentences: One of the twin sons-Thaervan Malaiyan (also given as Thaeveekan/Deiveegan)-later married thrice. Thaervan caste is a Malaimaan, Nathamaan, Moopanar and Suruthimaan that it's collectively known as the Parkavakulam caste.