historian

noun historian

• professor — a teacher of the highest academic rank in a college or university, who has been awarded the title Professor in a particular branch of learning; a full professor: a professor of Spanish literature.
• writer — a person engaged in writing books, articles, stories, etc., especially as an occupation or profession; an author or journalist.
• teacher — a person who teaches or instructs, especially as a profession; instructor.
• chronicler — a chronological record of events; a history.
• historiographer — a historian, especially one appointed to write an official history of a group, period, or institution.