David Gnaniah Pothirajulu, (19 September 1936 â 5 September 2020) was the third bishop in Madurai-Ramnad Diocese of the Church of South India, serving from 1978 to 1994 and was its deputy moderator from 1988 to 1990. Pothirajulu received his DOCTOR OF THEOLOGY (Th.D.) from the Boston University. He was a lecturer at the Tamil Nadu Theological Seminary from 1969 to 1978 until his elevation to the episcopate.