Pundit?

Pundit: The term originates from the Sanskritic term pandit, meaning "learned". It refers to someone who is erudite in various subjects and who conducts religious ceremonies and offers counsel to the king and usually referred to a person from the Hindu Caste System of Brahmins.

From at least the early 19th century, a Pundit of the Supreme Court in Colonial India was an officer of the judiciary who advised British judges on questions of Hindu law. In Anglo-Indian use, pundit also referred to a native of India who was trained and employed by the British to survey inaccessible regions beyond the British frontier.