commentator

Etymology

From Middle English commentator, from Latin commentātor.

noun

1. A person who comments; especially someone who is paid to give his/her opinions in the media about current affairs, sports, etc.
2. (historical, law) A medieval legal scholar who authored prose commentaries on civil law; (specifically) a member of a comparatively innovative 14th-century school of jurisprudence, typically distinguished from the earlier glossators.
   It would be well into the fourteenth century before the commentators came into their own. 2009, Randall Lesaffer, European Legal History: A Cultural and Political Perspective, page 257