vipratva - the quality of being a vipra; vikhyāta - well known; tāra - his; pāṇḍitya - erudition; ajñāta - unknown; ataeva - therefore; vipra - the word vipra; āge - first; pāṇḍitya - erudition; paścāta - afterwards.

“The man’s being a vipra is known, but his erudition is unknown. Therefore the person is identified first and his erudition later.