historian

noun3

1. •
   A writer of history.
2. •
   One who studies or researches history.

   • If this is what real people and societies are like, then it may be appropriate for historians to represent their subjects' lives in storylike form. — 1992
3. •
   One who recounts their own medical history.

   • The patient is unconscious when the syncopal event takes place and therefore is a poor historian. — 2007