Orator

It is recorded in English since c.1374, meaning “one who pleads or argues for a cause”, from Anglo-French oratour, Old French orateur (14th century), Latin orator(“speaker”), from orare (“speak before a court or assembly; plead”), derived from a Proto-Indo-European base *or- (“to pronounce a ritual formula”).

The modern meaning of the word, “public speaker”, is attested from c.1430.

—from wiki