Complex sentence: John did not have children of his own but was a father to all and adopted children in the village then Susi to Venkaya who descended from the Kshatriya caste in Kerala.
Split into simpler sentences: John did not have children of his own but was a father to all and adopted children in the village. Then Susi to Venkaya who descended from the Kshatriya caste in Kerala.